0:00:24 > 0:00:28Welcome along to Great Movie Mistakes.
0:00:28 > 0:00:33This show blows a hole in the carefully constructed veneer of Hollywood perfection.
0:00:33 > 0:00:37Our team of continuity experts or "geeks", have locked themselves away in the archives
0:00:37 > 0:00:40to track down the best howlers on the silver screen.
0:00:40 > 0:00:47So here are those mistakes, the ones that have made all that hard work very nearly worth while.
0:00:50 > 0:00:51Charlie's Angels.
0:00:51 > 0:00:54This scene features a hair-sniffing pervert
0:00:54 > 0:00:56and delicious Angels Natalie, Dylan and Alex.
0:00:56 > 0:00:59But as they make mincemeat out of the weirdo,
0:00:59 > 0:01:02Drew Barrymore can clearly be heard shouting "Lucy",
0:01:02 > 0:01:04the name of her co-star, Lucy Liu.
0:01:04 > 0:01:06Lucy!
0:01:09 > 0:01:11- Lugholes at the ready.- Lucy!
0:01:11 > 0:01:15How many times did I have to watch the film to get that?
0:01:15 > 0:01:17Less than 20. Get in!
0:01:19 > 0:01:23Bruce Almighty now. Supposedly, Bruce and his dog are all alone,
0:01:23 > 0:01:27but after a quick Hitler impression, the dog pees on the floor.
0:01:27 > 0:01:30But look, you can clearly see the dog handler's hand.
0:01:30 > 0:01:33If I was him, I'd be keeping my hand well out of the way.
0:01:35 > 0:01:38This is Click,
0:01:38 > 0:01:40and a scene starring trained coastguard David Hasselhoff.
0:01:41 > 0:01:44Here he is looking fetching in spectacles.
0:01:44 > 0:01:46Looking at my new partner.
0:01:48 > 0:01:51While he shovels in food, making less mess than he does
0:01:51 > 0:01:54on that drunken YouTube video, you keep an eye on those glasses.
0:01:54 > 0:01:57They're there.
0:01:57 > 0:02:00Then faster than you can say "sober up", they've gone.
0:02:00 > 0:02:03I spent money I don't have.
0:02:05 > 0:02:08A very glorified position where you have your cars and your houses...
0:02:08 > 0:02:12When Hayden Christensen chucks his beer bottle away...
0:02:12 > 0:02:16..here he goes, woo, tough guy! It smashes.
0:02:16 > 0:02:20But when he drives his motorbike into the lake like an idiot...
0:02:20 > 0:02:23the decking shows no sign of any broken glass.
0:02:23 > 0:02:26You could eat your dinner off that. But don't.
0:02:30 > 0:02:36The Harry Potter books have brought joy to children and very easily impressed adults everywhere.
0:02:36 > 0:02:40Now the subject of major motion pictures, they're riddled with errors.
0:02:40 > 0:02:44Interesting to know that Harry can cast spells to lock and unlock doors,
0:02:44 > 0:02:49summon fire and render himself invisible but he can't make Hermione want to get off with him.
0:02:49 > 0:02:53Not so clever now, are you, Potter?
0:02:57 > 0:03:00Sorry about him. He doesn't understand what it's liked.
0:03:00 > 0:03:03A prepubescent Harry Potter here, making idle chat with a snake,
0:03:03 > 0:03:04like you do.
0:03:06 > 0:03:08But...hold on, what was that?
0:03:10 > 0:03:12The snake just winked at him.
0:03:12 > 0:03:16And that, my friends, is impossible, because snakes don't have eyelids.
0:03:20 > 0:03:24Fashions, eh? These days, they seem to change in the blink of an eye.
0:03:24 > 0:03:27Just ask Ron, who goes from centre-parting...
0:03:28 > 0:03:31..to side parting in just under a hundredth of a second.
0:03:32 > 0:03:34Wicked!
0:03:36 > 0:03:40This one is also from Harry Potter and the Philosopher's Stone.
0:03:40 > 0:03:42Watch as the house starts to violently shake
0:03:42 > 0:03:46and the ornaments all remain completely still. Nothing even wobbles.
0:03:54 > 0:03:58Still, as long as Harry's having fun. Or Harold, as I like to call him.
0:04:01 > 0:04:03Ricta Sempra!
0:04:03 > 0:04:07An absolute beauty now from Harry Potter And The Camber of Secrets.
0:04:07 > 0:04:09When Snape pulls Malfoy back onto his feet,
0:04:09 > 0:04:14who's this in the far left of screen?
0:04:14 > 0:04:19It's either a film cameraman or some random guy walking around a school filming kids.
0:04:21 > 0:04:23Harry Potter And The Prisoner of Azkaban.
0:04:23 > 0:04:27If you can manage to tear your eyes away from Robbie Coltrane's haircut,
0:04:27 > 0:04:28you'll see Harry in the background.
0:04:28 > 0:04:32Yet here, he's on the bottom right, sat down.
0:04:32 > 0:04:34Now, that's magic.
0:04:36 > 0:04:39The Goblet Pf Fire now, and check out this sprinting slaphead.
0:04:39 > 0:04:41He runs past Ron twice.
0:04:47 > 0:04:48This is the first time...
0:04:51 > 0:04:54..and, dear, oh dear, there he goes again.
0:04:56 > 0:05:00The harsh truth is, if Ron wasn't ginger, we probably wouldn't have noticed.
0:05:04 > 0:05:07In this clip from The Order Of The Phoenix
0:05:07 > 0:05:10Harry has a nightmare so scary, it makes his T-shirt change colour.
0:05:16 > 0:05:18It goes from light blue with stripes...
0:05:21 > 0:05:23..to dark blue with buttons.
0:05:23 > 0:05:26It's also likely that he's wee'd the bed.
0:05:29 > 0:05:34Hollywood movie star, 20 million. Special effects, 15 million.
0:05:34 > 0:05:38Marketing and promotion, 9 million.
0:05:38 > 0:05:45Finding out you spent all your budget on that and haven't got any money left for props, priceless.
0:05:45 > 0:05:52But as this set of clips show, the Blue Peter school of prop-making is alive and well in tinsletown.
0:05:54 > 0:05:56Gangs Of New York.
0:05:56 > 0:05:58Life wasn't the same in the 1860s -
0:05:58 > 0:06:01car hadn't been invented, people spoke differently
0:06:01 > 0:06:04and rocks were made of sponge.
0:06:04 > 0:06:06Don't believe me? Then watch as the rocks
0:06:06 > 0:06:08bounce off these cheery bobbies.
0:06:08 > 0:06:11Boing, boing, boing.
0:06:11 > 0:06:13Doesn't look too painful to me.
0:06:17 > 0:06:18Here's The Matrix Reloaded,
0:06:18 > 0:06:21and what looks like Hull town centre at kicking-out time.
0:06:21 > 0:06:22More!
0:06:22 > 0:06:24But look at Neo's bendy pole.
0:06:24 > 0:06:27Neo, if you're going to single-handedly take on these bad guys,
0:06:27 > 0:06:29I'd recommend something with a bit less give.
0:06:36 > 0:06:39Now, comic book caper, Spider-man,
0:06:40 > 0:06:45in which these two Lycra-clad men have a fight to decide who's the campest guy in town.
0:06:46 > 0:06:51Spidey shoves Goblin against a solid brick wall. And look! It wobbles.
0:06:54 > 0:06:58It's not the Goblin you should be punching, it's your set designer!
0:07:01 > 0:07:06Ghost Town now, and Ricky Gervais's first big Hollywood film.
0:07:06 > 0:07:07He plays Bertram Pincus,
0:07:07 > 0:07:09a man who has the annoying ability to see ghosts.
0:07:09 > 0:07:14But what annoys me is the puerile errors like this.
0:07:14 > 0:07:16The medicine bottle here says one tablet a day.
0:07:16 > 0:07:20But what's this? There's quite clearly liquid in the bottle.
0:07:20 > 0:07:22The fools!
0:07:25 > 0:07:28For those of you who've never shot a dog with a gun,
0:07:28 > 0:07:30take it from someone who knows.
0:07:31 > 0:07:34This prop of a dead dog from Oscar-winning No Country For Old Men
0:07:34 > 0:07:36isn't the most realistic.
0:07:37 > 0:07:41I've made better ones from an old pillow case, crayons and gravel.
0:07:48 > 0:07:51Subtitles by Red Bee Media Ltd
0:07:51 > 0:07:54E-mail subtitling@bbc.co.uk