Also, another important rule: If there is a yellow-line rule in effect in a criterium and you're coming up to the finish line on a hot-contested prime, and you know you can't contest the sprint, get over as far to the right as possible.
I've gotten DQed from two races for crossing the yellow line to get around these slowpokes who can't imagine that there is anyone faster than them in the world. God forbid you can't win a prime while riding in the 50-23 sitting on your Giant OCR3.
It's dangerous and stupid, don't do it.
[/elitist rant]