Plot hole: When Ward's son hits the switch marked "Do Not Touch This Switch", every light in the amusement park comes on, music starts playing, and the rides all start moving. It's a funny gag, but it seems unlikely that one switch would power every single thing in the amusement park, and that everything in the park has been left on "full speed." If that's the case, when Angelo first sent the two lookouts to the top of the ferris wheel, everything else in the park should have come on then too.
1941 (1979)
1 plot hole
Directed by: Steven Spielberg
Starring: Christopher Lee, Dan Aykroyd, Ned Beatty, John Belushi, Lorraine Gary
Continuity mistake: During the scene when Wally gets hit by the soldier in the cafe, and Wally bumps into another soldier, causing him to go into a cake, take notice of how much cake is on him throughout the different camera shots. Also Pops (the owner) starts to wipe the cake off of the soldier's face. The amount of cake changes between shots. (00:09:20 - 00:10:15)
Colonel "Madman" Maddox: Identify yourself.
Captain Wild Bill Kelso: Captain Wild Bill Kelso, United States Army Air Corps. Where the hell am I?
Colonel "Madman" Maddox: Barstow. Where are you coming from?
Captain Wild Bill Kelso: San Francisco. Been chasing a Jap squadron for a day and a half. I lost 'em somewhere over Fresno.
Telephone Operator: I'm from Moline, Illinois.
Captain Wild Bill Kelso: Tough shit.
Trivia: The U-boat in 1941 was a mock-up made just for the film. It was the front half only and all scenes of the sub were shot on a sound stage water tank. The sub just rose up and down out of the water. They did have a model sub that floated in the same studio tank for the scenes with the amusement park and ferris wheel.