I was going on a tour awhile back and had an unusual experience. It was a HOT day - over 100 F mercury. The heat was glaring off the road.
We were riding pretty hard which may have had something to do with it, but when we stopped for a break, my calf touched my chainring. The chainring was HOT and it burned my calf to the point that I got a perfect chainring blister burn.
It looked cool after the blister popped and it turned into a red-brown chainring scab.
I thought this was very unusual. Has it happened to anybody else or have you heard of it?