I do, and I have more than one! One is when i got so drunk at a birthday party that I wasn't able to walk, talk and understand what people were telling me, that's the closest I've ever got to a coma and since then I kept drinking, but I heavily reduced the amounts of alcohol I consume at parties.

Another one was a bike accident i had. I didn't break any bones but I had some bad cuts and it left me scarred and now I don't ride motorcycles anymore.