When I was in 7th grade and around 11 years old, I sat watching tv on a sheet of glass that was a coffee cart table. I used it as a chair, my butt went through the glass and cracked it in pieces and a big shard hit my ankle and cut my heel three quarters of the way through. My heel was hanging off my foot and I nicked my Achille's tendon.
Lucky for me, my dad was home and drove me to the hospital. He almost fainted when he saw it.
I got 18 stitches in my foot and it is fine today. It was touch and go for awhile. They were not sure I was going to be able to walk right.