Agree Cobblers probably the worst - only times were in my teens when launching sailing dinghies a few times - after the second time learnt to wear wetsuit boots - funny that there don't seem to be as many around now days - or am I just becoming old and think things were more prolific in the "old days".

10 year old - falling of a jetty while mucking around with a mate - grabbing the foot wooden railing as I fall in and scrambling with my feet to get some purchase on the verticle wave breaking wooden boards (barnacle encrusted at water level) - needless to say all my toes and the front balls of my feet were shredded - infections and pain for weeks. What a stupid thing to do

Hit from behind in the back of the head by a brick at a school camp at 13 following a testosterone induced argument with a total dropkick, knocking me out for a few minutes - result many stitches and re-occuring headaches.
Rear-ended in car collision at 21 - I was stopped at giveway sign, the other person didn't notice me stopped, he reckoned. Bad back ever since.
Rolling a car in the country and having a tool box I had behind the passenger seat gouge the back of my head - more stitches - atleast it just gouged and didn't land square

Funny how most occurred when I was a young teenager.
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The worst I've seen is the result of someone getting tyre ringed when I was working away. They fill the inside of a tyre with petrol, jamm it down over the top of you, which locks your arms, then light it - I think this would be one of the worst ways to die.
Nearly threw up at the sight of this one occurring when I was about 14 - mooring a boat at Rottenst at the jetty with a strong easterly - one of the crew had hold of a rope and also the 1x19 wire sidestay - large wave = spliced finger into sidestay - flesh all mangled and squashed apart - not a pretty sight. Needless to say top half of his finger was lost - too mangled to repair.
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PS: Mark's with the red hot nut up the nose is an absolute classic - can't imagine the pain of that one. Either worst luck possible or a likely winner of the Darwin awards.