I had an embarrassing injury. My friend was boosting me onto her horse, and we didn't coordinate our actions well enough. I didn't jump at the right time, so I didn't get the full benefit of her push, and I ended up on the horse, just sitting on his rump behind the saddle! He took off bucking, I slid off his rear end, and his hindquarters caught my chin in mid-buck, breaking my jaw.
I didn't find out it was broken until a few months later, when I went to the doctor because I still couldn't open my mouth properly. To this day, I suffer from TMJ disorder and I cannot open my mouth straight - the ligaments on one side of my jaw are too damaged to function.
"When the power of love overcomes the love of power, the world will finally know peace." - Jimi Hendrix