Americans have been intentionally ramming cars into each other for sport for decades. And at this time of year, fans crowd into county fairs to see battered, souped-up cars bash each other to pieces.
This steel equivalent of blood sport draws a passionate following, and the drivers say it is deeply addicting.
"There's nothing better," says John Green, a demolition derby driver at a recent fair in Franklin County, Kan. "A lot of people say they would do it, but until you get in there and do it you never know the real feeling."