In the season 1 episode Detention, Joey beating the snot out of a line-cutting, sexually aggressive Jerk Jock with a lunch tray.
Pacey and Dawson putting their feud aside temporarily in season 4 to (along with Jack) pull off an epic senior prank (they steal the principal's boat, take it apart, then put it back together in the school swimming pool), while using their very public falling out to divert suspicion.
Pacey's Breaking Speech to Mr. Peterson, the asshole teacher who carelessly outs Jack and continues to publicly humiliate him. He acknowledges that his initial reaction (spitting on Peterson) was utterly wrong, but then calmly takes the teacher apart and calls him out in front of the school principal on every part of his cruel treatment of his students. Peterson is gone by the end of the episode.