do you need sensored setup for drifting/doughnuts?

I have a e-mountainboard unsensored. I was doing doughnuts in grass, fell down and when i got back up one of the motors wouldnt spin. It just coggs back and forth now. Im guessing some magnets broke loose. Do I need sensored setup to do drifting/doughnuts safely?

Well i spoke too soon. It was just one of the barrell connectors. Put a new one on and it works again. Im still curious though. Does it do any harm for the motors to spin at different rates(doughnuts) running unsensored?

watch out for nowind
he drives mostly with sensoreless boards
https://www.youtube.com/channel/UCTiFtpdd0nVU915rn5Klpow