I'll admit to not being a huge fan of Nascar. It's not that I don't respect the twitch skills of the drivers or the tireless dedication of the crew, but I just don't find multiple hours of cars circling an oval track to be terribly exciting. Living half an hour away from the Homestead-Miami Speedway, while being the son and grandson of two of the biggest gear heads, I went to my fair share of races as a kid. Most of these races ended up with me passing out of childhood boredom and being carried back to the car. But every once and a while, there would be a massive crash; nothing wakes you up and excites quite like the screeching and crunching of metal from advanced racing machines.
Crashes are a big selling point for the NASCAR franchise, if not THE major selling point. The only things ever shown on an ESPN recap of a race are the crashes and finishes. There is obviously some kind of primal want in all of us that is obsessed with explosions and crashes so we need some type of entertainment to satiate it, but what makes racing accidents so poignant is their absolute realism. There is no CGI or movie magic, just drivers risking their lives in flying metal death traps. After the tragic death Dale Earnhardt, NASCAR has been taking steps in the right direction safety-wise by creating the car of tomorrow, improving seatbelt technology, and updating the material of walls.
If you need to calm your primal urges, here is an aptly named video
BEST NASCAR CRASH COMP EVER by thpmarc