While replacing the wiper on DC 6A, Miner #1 cut 95% of the shaft and made decision to kick the shaft to break it. Miner #2 outside of the chute/guard section was holding the shaft to stop it from falling, when miner #1 kicked the wiper shaft it caused the shaft to abruptly move consequently pinching miner #2 Right thump between the guard/chute and the wiper shaft.