cracked my head open 3 times while skiing.
first time as a kid, in a collision whith another kid who knocked me over the head with his ski - huge bump, 1 inch gash, no stiches, no helmet.
second time in a race, took a dive, rolled down the slope, stopped by face-planting in a tree - busted googles resulting in a 1 inch cut beside my eyebrow, black eye, no stitches, had a helmet.
third one at a pond crossing contest (whatever it's called; ski, try to cross a pond), turns out i should've leaned further back, i bellyflopped, knocked myself over the head with the tail of the ski - giant bump, headache, 2 inch gash, 3 staples, no helmet.
maybe i should buy one
.. but it seems i end up with cuts and gashes with or without a helmet.