[KenWittlief]

when you spin a motor (backdrive it) it acts like a generator. We use to demo this with the globe motors and the old rotating lights - hooking them together, turning the globe motor with a wrench and the rotating light would lightup and spin

during an event when you let off the joystick, the motors back-feed, and depending on whether you have your victors set to coast or brake, the counter-EMF (generated voltage) from the motors will either be shorted through the victors to act like a brake, or it will be left open circuit and the bot will coast to a stop.

I dont think you can blow out your victors this way unless you were pushing the bot really fast, and the motors were generating a voltage above the Victors rated MAX voltage spec.