Trans-Am, World Challenge GT and Touring, F-1, Cart, Aussie V8 Supercars, MotoGP, ALMS, Grand-Am. In that Order.
I think it's like a pubic louse? Attaches itself to you're pubs (if ya got 'em) and then crawls down the hair to your skin, takes a bite of your skin, then shits on your skin, then crawls back up the pub. My favorite kind of racing is: #1. WRC #2. Bikes #3. Touring car . . . . And last but not least #100. Nascar