0:00:23 > 0:00:26An anachronism is when something stands out
0:00:26 > 0:00:30from everything around it as just being from the wrong era in time.
0:00:30 > 0:00:33Think Prince Philip at a Justin Bieber concert.
0:00:33 > 0:00:37A glaring anachronism can immediately ruin any good period movie.
0:00:37 > 0:00:42I mean, Pride and Prejudice would have been rubbish if Darcy and Bennett had met via online dating.
0:00:42 > 0:00:46Or if the soldiers in 300 had got together at a flash mob.
0:00:46 > 0:00:50"Spartans, tonight we meet on Twitter!"
0:00:50 > 0:00:53Doesn't really work, does it?
0:00:53 > 0:00:57Just what we needed, yet another Robin Hood movie.
0:00:57 > 0:01:01But this one is going to be perfect, right down to every last detail.
0:01:01 > 0:01:06Like this smoothly cut tree stump that has blatantly been cut with a modern machine.
0:01:06 > 0:01:11Because they didn't use axes back then, they used ye olde chainsaw.
0:01:17 > 0:01:20In Robin Hood's day, they also used modern war equipment, just like
0:01:20 > 0:01:24these World War Two landing craft straight out of Saving Private Ryan.
0:01:24 > 0:01:28Despite the fact that they weren't invented until the 1920s.
0:01:28 > 0:01:31Only 700 years out. Yaar!
0:01:36 > 0:01:39Might as well go the whole hog, Robin.
0:01:39 > 0:01:41What's that up in the sky in this shot?
0:01:41 > 0:01:45That's right, the vapour trail from an aircraft.
0:01:45 > 0:01:46In the year 1200.
0:01:51 > 0:01:56The high seas, 1589, and a couple of clips from St Trinian's 2.
0:01:56 > 0:02:01This film is full of anachronisms, not least casting Girls Aloud's
0:02:01 > 0:02:03Sarah Harding as a 16-year-old schoolgirl.
0:02:09 > 0:02:12But in this scene, the clanger is a view through a telescope.
0:02:12 > 0:02:18I don't need to tell you that the telescope wasn't invented until 1608.
0:02:18 > 0:02:20He doesn't care.
0:02:22 > 0:02:24In the improbably titled Hot Tub Time Machine,
0:02:24 > 0:02:27a group of modern-day losers go back to the year 1986
0:02:27 > 0:02:31in a hot tub that's also a...time machine.
0:02:31 > 0:02:36No foreign army has ever occupied American soil until now.
0:02:36 > 0:02:38Well, I'll believe that, but not this.
0:02:38 > 0:02:40A poster for Rambo 3.
0:02:40 > 0:02:44It wasn't released until 1988, two years later.
0:02:44 > 0:02:47Who's responsible for this mistake?
0:02:47 > 0:02:50- The Ruskies. - Yeah, I might have guessed.
0:02:52 > 0:02:55Accident blackspot? These aren't accidents.
0:02:55 > 0:02:59A cinema classic that struggles to stay in the '60s.
0:02:59 > 0:03:02They're throwing themselves into the road to escape all this hideousness.
0:03:02 > 0:03:04Throw yourselves into the road, darling!
0:03:04 > 0:03:09Tearing down a '60s road in their '60s car with a bottle of '60s booze.
0:03:09 > 0:03:14But they seem to have taken a wrong turn and ended up in the 1980s.
0:03:14 > 0:03:18See those? Loads of '80s cars.
0:03:18 > 0:03:21Well, that's what drink-driving will do for you.
0:03:21 > 0:03:22Are you out of your mind?
0:03:22 > 0:03:24Pull over, you haven't got a licence.
0:03:24 > 0:03:26They also pass a modern motorway sign.
0:03:26 > 0:03:33In fact, the M25 didn't exist until 1975, and that's not in the 1960s.
0:03:38 > 0:03:42Here's a clip from the smash hit, The Girl With The Dragon Tattoo.
0:03:42 > 0:03:47When our hero, Mikael Blomkvist, goes for a jog, he has a flashback to his childhood in the '60s.
0:03:50 > 0:03:57Spot the problem? Yeah, this was a childhood in which he wore modern trainers from the future.
0:03:59 > 0:04:04Next up is Avatar, the worldwide blockbuster that asks an age-old question -
0:04:04 > 0:04:08what if giant Smurfs with pointy ears could control flying dragons with their tails
0:04:08 > 0:04:12and make a tree go all glowy and... Yeah, I didn't understand it either.
0:04:12 > 0:04:13And it was SO long.
0:04:13 > 0:04:18James Cameron, take a leaf out of your brother David's book and make some harsh cuts!
0:04:18 > 0:04:23If I want to spend three hours in a darkened room wearing a pair of cheap plastic glasses,
0:04:23 > 0:04:24I'll go to a tanning salon.
0:04:27 > 0:04:30Avatar is set in the mythical world of Pandora
0:04:30 > 0:04:33and features a Pandora's Box full of movie mistakes...
0:04:33 > 0:04:36such as combining the plots of FernGully and Pocahontas.
0:04:38 > 0:04:43In this scene, Neytiri's ponytail is out of sight, over her shoulder.
0:04:44 > 0:04:46Then it's on her back.
0:04:47 > 0:04:49Seze.
0:04:51 > 0:04:54And when she goes to plug it into her dragon/horse,
0:04:54 > 0:04:57it's around her front again.
0:04:57 > 0:04:58Ikran is not a horse.
0:04:58 > 0:05:00Ooh, well excuse me!
0:05:01 > 0:05:05This guy may be the corporate baddy of the film,
0:05:05 > 0:05:07but he's got incredible golf skills.
0:05:07 > 0:05:09He can move balls without touching them.
0:05:09 > 0:05:12First the two balls are close together.
0:05:12 > 0:05:14You were looking at the monitor.
0:05:14 > 0:05:16I love this putter, Ronnie!
0:05:16 > 0:05:18I love this putter!
0:05:18 > 0:05:20Next, they're far apart.
0:05:20 > 0:05:24Parker. You know, I used to think it was benign neglect,
0:05:24 > 0:05:27but now I see that you're intentionally screwing me.
0:05:27 > 0:05:31Grace, you know, I enjoy our little talks.
0:05:31 > 0:05:33Then they're back together.
0:05:33 > 0:05:34Oops.
0:05:34 > 0:05:38This is wrong in all three dimensions.
0:05:40 > 0:05:45Here we see Jake return from his Avatar to the real world.
0:05:45 > 0:05:48The boring old real world where mystical things don't exist.
0:05:48 > 0:05:52Like Sigourney's hand magically moving from his arm...
0:05:52 > 0:05:54to his shoulder...
0:05:54 > 0:05:56back to his arm.
0:05:56 > 0:05:59Avatar? Ava-word with yourself, Mr Cameron!
0:06:01 > 0:06:03And it happens again.
0:06:03 > 0:06:06Watch Jake's arms start on the table.
0:06:06 > 0:06:08Now they're on his wheelchair.
0:06:11 > 0:06:12Now they're out straight.
0:06:12 > 0:06:14Now bent.
0:06:14 > 0:06:17Now straight again.
0:06:17 > 0:06:20Honestly. It makes me turn blue with rage!
0:06:22 > 0:06:26Here's a big fight from the end of the film.
0:06:27 > 0:06:31Have a look at Col Quaritch in his cockpit.
0:06:31 > 0:06:34There's a wing mirror right at the back, behind his head.
0:06:34 > 0:06:38Notice how the front strut is completely mirrorless.
0:06:38 > 0:06:42But then, suddenly...
0:06:42 > 0:06:46Hello! A mirror right by that strut, and clearly in front of his head.
0:06:46 > 0:06:49A bit of high tension in the jungle...
0:06:49 > 0:06:52No mirror in front of him here.
0:06:52 > 0:06:54Still no mirror in front of him.
0:06:54 > 0:06:55And, hello!
0:06:55 > 0:07:00A handy mirror to see a horsey dragon attacking his giant robot.
0:07:05 > 0:07:06You know what I hate?
0:07:06 > 0:07:12- (OUT OF SYNCH)- Those moments in films where the actor's mouth isn't synched up with what they're saying.
0:07:12 > 0:07:14Sometimes, their mouth isn't moving,
0:07:14 > 0:07:16sometimes it's moving but nothing's coming out.
0:07:16 > 0:07:21Still, it's better than watching Twilight, where you CAN see Robert Pattinson's mouth moving
0:07:21 > 0:07:23but what you hear is absolute drivel.
0:07:23 > 0:07:25We found our hideout...
0:07:25 > 0:07:27Let's start with The Goonies and a man driving the car,
0:07:27 > 0:07:30trying to pull off an Amy Winehouse -
0:07:30 > 0:07:33singing and smoking at the same time.
0:07:33 > 0:07:34Look in the car mirror.
0:07:34 > 0:07:37MAN SINGS
0:07:37 > 0:07:39We can hear his voice, but his mouth isn't moving.
0:07:39 > 0:07:41MAN SINGS
0:07:41 > 0:07:43Watch and learn, Winehouse.
0:07:45 > 0:07:48In the movie Collateral, Tom Cruise and Jamie Foxx
0:07:48 > 0:07:52go to a jazz club that's so groovy, it ignores the rules of physics.
0:07:52 > 0:07:55Behind the notes. Not what's expected.
0:07:55 > 0:08:00Listen as the trumpet note continues, even though the trumpeter's stopped blowing.
0:08:01 > 0:08:02NOTE CONTINUES
0:08:02 > 0:08:03Nice.
0:08:06 > 0:08:09- Have I told you about Sammy Jankis? - Mm, yeah.
0:08:09 > 0:08:12Memento now, and watch the guy on the right's mouth.
0:08:12 > 0:08:13You think he's still here?
0:08:13 > 0:08:16Another one talking without actually moving his lips.
0:08:16 > 0:08:19- What about John G? You think he's still here?- Who?
0:08:19 > 0:08:20Johnny G, the guy you're looking for.
0:08:22 > 0:08:24I was exceedingly cruel...
0:08:24 > 0:08:27Now, this woman is talking so much,
0:08:27 > 0:08:30you can still hear her when her mouth isn't moving.
0:08:30 > 0:08:34Watch closely as she's put down on the sofa.
0:08:34 > 0:08:39Not that I'd trade a day, and hour or a moment of it for anything. I don't know what came over me.
0:08:41 > 0:08:47And here is a classic mouth-wrong from The Notebook.
0:08:47 > 0:08:51Take note! Just because a scene is dimly lit does not mean
0:08:51 > 0:08:54you can dub over completely different words.
0:08:57 > 0:09:01- Ohh! This place is gigantic! - Yeah, gigantic piece of...
0:09:01 > 0:09:03Subtitles by Red Bee Media Ltd
0:09:03 > 0:09:05E-mail subtitling@bbc.co.uk