Okay, here's my contribution. It involves an Xacto knife, bottlecaps, and me being mentally MIA.
I don't know what possessed me to do this, but a few months ago I wanted to make something awesome with bottlecaps. I had seen online that someone had successfully used an Xacto to remove that pesky liner from their caps. So I went to town with the knife, and it slipped, cutting the middle finger on my right hand. That cut bled like crazy for about 5 minutes! I panicked and then it dawned on me to hold it above my heart and apply pressure to get it to stop. I almost fainted and I had a nasty looking cut for about 2 weeks. Now I have a scar to remind me to be careful in the future.
I still feel ridiculous about that accident.