Here is one out of the 123 mistakes in the hit movie, Spider Man:
During the end sequence, Spider-Man originally did his final swing through the World Trade Center towers, landing on top of the tower with a flagpole on top. This was changed after September 11th so that he lands on the Empire State Building instead. However, during the pan around him after the landing, you can still see the Empire State Building, which he just landed on, in the background!
Who has the time to watch the movie over and over again to notice these mistakes? 
