Here's another one.
Harry Potter and the Chamber of Secrets
: When the Cornish pixies are set loose, Hermione deliberatly knocks her books off the desk.
There used to be quite a few bloopers in the Star Wars
trilogy, but Lucas edited them out in the newer editions. If you can get your hands on an older copy of the movies, watch for these bloopers.
One of the Storm Troopers bangs his head into a doorway.
At times, you can see the reflection of the camera and crew in C3PO and on Darth Vader.
When Luke lands his TIE fighter, Leia runs up to him yelling "Luke!" He responds by yelling "Carrie!" (Leia was played by Carrie Fisher)
When Han gets defrosted in RotJ, he's wearing an outfit different from the one he wore when he got frozen in TESB. (Did Jabba defrost him long enough to change his clothes?