EE AS A TRACKMAN ON RAILROAD TRACK WAS INSTALLING A BOLT IN JOINT WHERE RAILS ARE HELD TOGETHER AND IT WAS A TIGHT FIT. HE STRUCK BOLT WITH A HAMNMER CAUSING IT TO FLY BACK STRIKCING TOP OF RI GHT FOOT. THIS LEFT ONLY A RED MARK LOOKED AT BYFOREMAN EE WHO TOLD HIM TO HAVE IT CHECKED IF NECESSARY.