How do firefighters learn the proper method of opening a Tesla Model S, with its high voltage cables, battery pack, and DC converter? They tear one apart for practice.
Wired put up this video (skip straight to the carnage at 27:47) made by Tesla itself. What's interesting is just enough care has to be put into avoiding slicing into any high-voltage components as the firefighters have to take just for the car's high-strength modern construction.
You can't just chop a car in two anymore, and definitely not an EV.