Audio problem: Right after the first press conference, Izzy and Emily are seen walking and talking. If you watch Emily's lips they are not in sync with what you hear.
Audio problem: When Chris asks Emily if she wants her nipples pierced, we hear her say "Maybe", but her mouth moves as if she says "yeah".
Audio problem: When Chris' band is playing in their blood pollution concert, right before the fight, the bass player is pushed onto the drums, and you can see he stops playing, but you can hear all the music stops except for bass, which is the last to stop.
Answer: He is meant to be maybe in his early to mid 20's.