The last one I had was interesting and potentially dangerous.
I was kayaking the river Soca in Slovenia. I went down a drop then the river went hard right on a big shoulder of water. For some reason I capsized on the top of the shoulder. I decided to wait a second to roll. My boat was travelling in reverse.
CRUNCH! I’d hit a rock with the back of my head reallybloody hard. Dazed, my first roll failed, but I was up on the second attempt. I didn’t have a clue what was what . My paddling mates got my to sit in the eddy and they monitored me for 10 minutes.
I didn’t look or feel too good.
The problem was that we were paddling a section of river with no get outs for an hour or so, and we’d not long started, so I had to get on with it.
Someone on the trip gave me some super strength pain killers, but it didn’t touch it.
I flew home 2 days later, maybe not too healthy.
my headache lasted about 3 weeks.