I once got to cut open a Viper that'd been involved in a minor fender-bender (maybe $2k in damage). The driver was injured (no seatbelt, no surprise), and at ~350 lbs. the door was jammed and there was no way to get him out without cutting off the roof. I think they totalled the car after that, we only cut the minimum to get him out but heavy hydraulic cutters and spreaders are not kind to the thin sheet metal in today's cars.