It's amazing how well Mewes performed in JASB considering how many hard drugs he was hooked on during the production of the film. Kevin jokes about Jason being self-conscious to this day about the way he looked in the 2001 movie because his drug use at the time added some fluid weight to his face, and when he'd lean over or be filmed from a certain angle he says he looked awful.
It's definitely a world of difference between his performances in JASB and Clerks 2
. The character is the same Jay, but there's a sobriety and focus to Jason's acting in the latter that shows just how far he had come during his battle to clean himself up.