[KenWittlief]

dont forget humans. It can be pretty noisy in the pits and on the playfield. If someone reached into your bot and a big wheel (with belts or chains) was still spinning, would they be able to get their hand or fingers into a moving part?

This normally isnt a problem with drivetrains (because parts dont keep spinning when the bot is not moving) and the pneumatics can be vented with the mandantory release valve.

It can be hard to tell if something is spinning - one of the most common accidents on cars is people sticking their hand into the spinning fan or fanbelt on a running car engine.