Ummm, cheater, you have to look over your shoulders to check your blind spots which aren't covered by the side mirrors.
I've been known to suffer from "Road Glee" a little too often, usually at guys who tromp on the gas, and then get taken down by the speed trap at the next bend, or guys who try to jump lanes to get ahead of me, but end up behind.
Just remember, everyone faster than you is a maniac, and everyone slower than you is an asshole!