Watching a really good movie is one of life's simple pleasures. But that 1.5 hour film you just enjoyed was anything but simple to make. It can take years to complete a feature length movie. And hundreds, if not thousands of people are involved in various parts of the process.
Iron Man 3 set the record for the biggest crew ever, with a total of 3,310 members working on the 2013 blockbuster. Even with that many hands on deck, there were still dozens of mistakes in the movie by the time it hit cinemas. But it certainly didn't break the record for most "oopsies" in a film. That prize reportedly goes to Alfred Hitchcock’s horror film The Birds. The 1963 flick had a total of 552 mistakes, averaging 4.64 per minute.
Bored Panda took a trip to the Movie Mistakes site, and compiled a list of some of the funniest blunders ever to grace the big screen. We reached out to production expert and Creative Director of NoStairway Rob Marshall, for some tips on how to keep movies clean and error-free.
#21 Bean

When Mr. Bean is in the operating room, there is a man standing behind a machine who is not dressed like the other surgeons.
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Sometimes it’s celebrities and actors themselves who point out the mistakes—rather publicly. Quentin Tarantino’s Once Upon a Time in Hollywood is set in the year 1969. Toward the end of the movie, Leonardo DiCaprio’s character, Rick Dalton, reportedly arrives back in Hollywood from Europe on a Boeing 747.
Fellow actor John Travolta didn't skip a beat when he noted this would have been completely impossible. “Well, the 747 had its test flight in February 1969, but it went into service in January 1970," quipped Travolta, a trained pilot and plane enthusiast. "They’re nine months off! He would have been on a Boeing 707!”
#22 Bridget Jones's Diary

When they're driving back to the Darcys' in the snow, you can see that as they pass through the village near the house, the snow on the ground is in fact a white ground sheet and has not been pulled up to the edges of the wall surrounding the green. (01:17:25)
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#23 Mr. And Mrs. Smith

While being chased by the 3 BMWs, the passenger's headrest of the Dodge minivan driven by Brad changes from a 1-piece (part of the seat), to a headrest that you can adjust the height and it keeps changing during the scene.
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#24 The Jackal

As the FBI and Richard Gere rush to the hospital to save the First Lady they are flying in a helicopter. You see a shot of the helicopter flying over buildings then it cuts to dialogue inside then back to the landscape shot. However in the first shot the helicopter carries the number "28" on the side. When it cuts back after the dialogue it has "29" on the side of it. (01:36:35 - 01:40:00)
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#25 Rambo: First Blood

Visible crew/equipment: At the beginning of the movie, Sheriff Teasle escorts Rambo to the outskirts of town. As the sheriff drives off, the boom mike is visible in the reflection of the car's right rear passenger window. (00:07:30)
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#26 Pirates Of The Caribbean: Dead Man's Chest

At Tia Dalma's, when Jack says, "Look, an undead monkey," and shoots the monkey, the flame of the candle above the monkey is extinguished from the gunfire. However, in the next shot that candle is burning brightly. (00:49:30)
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11points
#27 Men In Black

When Will Smith and the other recruits are taking their written tests, the white table first appears to be situated between the second and third men from the left. When Smith goes to the table to pull it across the room, it is much further to the right of the scene. (00:24:25 - 00:26:35)
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#28 McLintock!

In Kate's hotel room, when she's trying to get away from GW she steps backwards through the hotel room's doorway onto the porch, and falls straight through the broken wood railing, but when GW looks down at Kate on the pile of hay, there's now a window behind GW, not a doorway, and clapboard siding has suddenly appeared on the hotel wall as well.
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10points
#29 Taxi 2

When Émilien is chasing after the Ninjas on foot, they jump from a bridge onto the top of an orange lorry. The orange crash mats that the 'Ninjas' land on are visible in the overhead shots. (00:47:35)
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#30 Bruce Almighty

In the scene where Bruce is confronting the g**g that beat him up earlier, he has the monkey come out of the guy, who falls to the ground in pain. After the other guys run away, there is a shot of Bruce taunting them, but the injured guy is not on the ground behind him, even though he should be visible. A second later, he reappears when Bruce turns to face him. (00:38:35)
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