Ace Ventura was the first time I noticed differences in a movie. When they showed it on regular TV they did a whole bit about star trek when he was in the pool

Ace Ventura was the first time I noticed differences in a movie. When they showed it on regular TV they did a whole bit about star trek when he was in the pool looking for clues. Everyone thought I was nuts, but years later I learned that when they edit a film for commercials sometimes they use deleted scenes to make up the time differences. Harry Potter is like that too, but I can't remember the specific scenes.