I've had multiple close calls. A fall when climbing in the lakes. Only about 30ft, but I hit the deck, took most of it on one leg. Rope started to pull about 1m before I hit and took some sting out (I was falling backwards as I was on an overhang), so it spun me. Stopped me from landing flat on my back, but accelerated my feet into the ground. Damage to my right ankle still gives my problems, 30 years on.
Kayaking on a flooded river, going upstream between two large fallen trees. Not a large enough gap to ferry glide, just have to poke kayak bow up, paddle like fury across the diagonal. Got it wrong on about the 20th time, ended up stuck against one of the trees. Just had time to think "bugger, I'll have to climb out of my boat and carry it round" when I realised that the current was sucking me down. Next thing, I was upside down, under the tree. Buoyancy vest held me up against the tree trunk, current and friction stopped me from moving . . . I was stuck. Took me a while to get out.
Those were the closest of close calls. There have been a few car accidents, including a multi-car pileup on the M1 (I was the passenger, every time).