Pretty nasty! I remember one time my coach asked me to go to a coaching training session so that people could practice spotting with me. Anyway they went off on a bit of a tangent and started talking about men's high bar and this one person wanted to know how to spot something. It was a WAG coaching course and a couple of people really didn't know much at all about MAG so they didn't know what the skill was and asked for a demo. So my coach (he's a bit of a show off but we love him for it) leapt up onto high bar,started to swing and then suddenly let out a yowl like a strangled cat and fell off. We all went over to see what had happened and he had literally just ripped the whole of his hand from his wrist to the bases of his fingers and the skin just sort of hung in a massive flap. It was disgusting!