One of my best friends growing up (and we're still friends) has had surgery on BOTH of her feet. However, we were in high school so being young had it's advantages.
One time when she was on crutches we had stopped at a friends house. She was standing by the car with the car door open. I was in the drivers seat. One of the guys was messing around and laying on my hood, so I put the car in reverse to "throw" him off. Yeah, I smacked my friend and made her drag her foot on the ground. I felt so bad and was crying, but she was laughing. Luckily there was no severe damage from my stupidity.