Bits of interest:
Ursula's intro - dancing and shaking those big tits
Ursula's "normalising" - her tits shrink and grow a couple of times before she freaks out for having big tits
Sex Addicts - A couple of nice tits appear in bras
The bushes - watch Ursula's breakout scene a bunch of bushes look like a woman laying on her back read for sex
Fat Fuck Frank - He's one of us... a tit-man
Tits in trees - there are tits on tree... nuff said
Overall, Selma's character is a very small part of the movie. When she becomes "normal" it sucks big time, thank god its only for a short while. But yeah, she is a small part of the movie however the movie is an insane laugh. Johnny Knoxville is funnier then his usual crap in this film.