Oh cool. Still would suck to get sand papered. I wonder if could make something like those construction cutting blade things, where if you trigger the bar with

Oh cool. Still would suck to get sand papered. I wonder if could make something like those construction cutting blade things, where if you trigger the bar with a lot of force it hard stops. I always wear the clip i've fallen off a treadmill before didn't get great balance on the hand rails stepping off a sprint.