Ok, have the best (worst) bloody story, and my TCC friends can vouch for it's accuracy. Sailing my old IC USA204, at the fall dinghy fest here, big gusty day, wetsuit on, was on end of seat all the way out when at full tilt the seat slid in so fast I couldn't even react. My butt crack hit the edge of carriage so hard I almost blacked out. Recovered enough to start sailing back to start line when I saw the blood trail on water and seat. Went in and stripped down to find massive gash in the worst place possible, went to emergency room and had 17 stitches put in! And I have the scar to prove it, but only my wifey has ever seen it.
And probably only an IC sailor can appreciate.