i had two of them outside on a table, using them to trap a log between them so it wouldnt roll while i was carving and sanding it with chainsaw/sander/angle grinder. i must have slid it too close to the edge and it fell off, right onto my foot. xray shows no breakage, just bruising. feels like the hair on my toeknuckles is broken, hurts like fawk just to touch those. squaat and deadlift from the heels ftw.