Menotti Aristone
Encyclopedia
Menotti Aristone was a jockey who raced in the 75' Kentucky Derby on his horse Bombay Duck. He was leading by three lengths when someone in the infield threw a frisbee over his head. That caused the horse to shy back and then someone else in the infield threw a can of beer at the horse, hitting him in the hipbone, causing Aristone to throw in the towel.