Thats UK and Holland mostly , sending the car out with a bang ... Rules are like speedway, the one with most laps wins the heat, but you can also go out just to wreck people, choice is yours...whats crazy, that most of the drivers will pull total wreck with HIABs and race it in another heat the same day ! Some of the crashes have to be close to 50-60MPH , I lived in UK near one of the tracks, I thought the drivers are mental, they probably are...Cars have floor, roof and door plate and H-frame behind the driver with fuel tank, do not have rads, just big water tanks behind the engine...welding should be limited to rust repair, mostly bolted together with the plates. They let prepped Imp to couple of the meetings and had to ban it after that...one of the head-ons resulted in other drivers injury...It is brutal sometimes, favourite cars are old Granadas, E-class mercs, Volvos, and whatever US wreck they can get their hands on...
https://www.youtube.com/watch?v=4szAE96LoDA