Top Ten Reasons Why Sport Riders Don't Wave Back

10. They have not been riding long enough to know they are supposed to.

9. If they took one hand off the bars they would break their teeth.

8. They look way too cool with both hands on the bars.

7. It's hard to put their hand in the air doing 175.

6. Their skin tight-kevlar-balistic-nylon-goose-leather suits prevent any position other than fetal.

5. One handed stoppies are ill advised.

4. They are waving, but you can't see it behind the neon green speed screen.

3. They were slipping their flip-flop back on.

2. Raising an arm allows bugs into the armholes of their tank tops.

1. They don't know how.