- Derf muses whether he or his friends were in any danger when they hang out with Jeff. Cut to a scene where Derf catches Jeff stalking him in the bushes outside his classroom window.
- In the movie, Dahmer beats a tree with a baseball bat after the jogger he was planning to attack doesn't run by that day. Initially, you think he's doing this out of anger and frustration because things didn't go like he planned. But upon remembering that the graphic novel said that Dahmer knew his fantasies were wrong, it brings that scene to a new light: he gets angry because he doesn't understand how his fantasies could bring him to try to enact on them.
Fridge / My Friend Dahmer