I've only done it a couple times, and unfortunately tonight was one of them. I was being a little sloppy on a turrn and my heels smacked the top of the gutter. Nothing broken but I'll probably have a good bruise. Add this to lanelines (the plastic floats can be sharp when broken) and hand collisions with other swimmers to the list of hazards.
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Former Member
Never done it that I can recall in my 32 years of swimming. But I have seen a few folks do it...some hard enough to split them open (yuck!).