Bet a couple of other students put him on the hanger as a prank, not realizing it would choke the victim.
It just sounds like a dumb kid stunt.
So true. Just like all the movies that show them dunking a kid’s head in the toilet. Funny in the movies, but in reality a very bad practice. Or running from the police when they try to stop you. The list of things kids are seeing in movies and on TV that make good entertainment, but are dangerous if not deadly.