In reply to Billhook:
Nearly. When younger and even more stupid I once did a big free hanging abseil on a rainy day. Was wearing trousers and waterproof over trousers as well. These acted as a smooth V shape so the leg loops could slide upwards.
As I got past the committing point something shifted in the left leg strap trapping left test icicle. Not sure what proportion of my bodyweight was used to squash it. But lifting that leg up didn't help in any way.
I was in so much pain and discomfort I thought I might let go of the rope or pass out or throw up and let go or something, and it was a fight of all my willpower not to do so about 25m up and no backup device (said I was stupid!) so letting go would have been terminal. When I got to the bottom I collapsed for 5 minutes and wasn't the same for a couple of days. (But physically recovered after that)
A lesson NEVER forgotten. I'm meticulous now to keep leg loops tight and pulled down, adjust them yet again when starting any descent or rope ascent, and pull some trousers up through the leg loops for a little slack so they don't make a V shape to funnel the legs.
The harness was a black diamond Alpine bod, and I replaced it after that, nothing wrong with them, I just don't fancy wearing one again.
Post edited at 09:18