One of my favorite jokes in this film...
Is when Robbie says to Lynda, "Now please get outta Van Halen t-shirt, before you jinx the band and they break up."
As many people know, especially VH fans, vocalist David Lee Roth DID in fact end up leaving Van Halen in 1985 (although he rejoined the band in 2008). Nice little inside joke, if I say so myself ;)