Just when Billy thinks he’s got this whole elementary school thing under control, he gets a rude—and very public—reminder that kids are savage. Caught in the most vulnerable of positions, this scene delivers one of the most unexpectedly awkward moments of the movie, sealed with the legendary line: “That’s assault, brotha!”
 
Did You Know?
The kid who pantses Billy is Adam Sandler’s real-life nephew. The line was improvised, and the crew laughed so hard they had to redo the audio in post-production.