The knife was to be used to keep his head shaved.

hahahahahahahahahahahahahahahahahahahahahahahahahaha, what a PUNK, he was so bad and had a lot of mouth when he was with his "boyz from the trailer park hood" but now he is visualizing himself in a jail cell with Big Black Freaky Freddie when the police picks his wimpy, slobbering self up and throws him in jail, now…