one day last year I was in the gym and went to the lat pulldown machine in the middle of my workout. someone had it on 200 lbs or something, so I pulled the pin out of the weight stack, and the entire attachment fell on the back of my head. this was a really heavy metal attachment, must have been like 20-30 lbs fell on my head. I got really dizzy for ~30 seconds and had a big bump on my head, but that was somehow all that happened.
to this day, I'm kind of scared and cautious whenever I change the weight on those machines.
At one point in my life I was doing a lot of intravenous oxycodone et al. I loved pushing my limits and was very good at it, apparently. At one point, and this wouldn't be the last time but was probably the first, I put about 130mg of oxycodone into one needle. I remember getting tunnel vision and a rushing sound in my ears. I woke up several hours later. A few months later I decided to look into those symptoms. Basically early onset overdose. Those were interesting times for me.