Nascar is great, more overtaking in one race of nascar than a full seaon of F1. Watch the Daytona 500 from two years ago (2008). It was won on the final lap and at the time anyone of six guys could have won it going into teh final straight.
Bump drafting takes a lot of skill and trust, it makes teh front car fastest and means that all the cars behind are using less power to do the same speed. Hence the slingshot pass. Again watch the race a mentioned above its a great example.
NASCAR is great if your there aswell. Much better than F1. It maybe american but its the biggest spector sport on earth by a long way. Americans love there motorsport, indy is the biggest F1 race of teh calender aswell. Americans now how to put on a show and NASCAR is the bigest of them all. the superbowl being the biggest one off.