Coopers' Rock Revenge! This is what my ankle looked like two days after jumping off a boulder problem from 20 feet high. Fortunately, my aim was good and I landed on a crash pad. Unfortunately, I did not know there was a crippling, turtle-shaped rock underneath the crash pad which caused me to roll my ankle almost 90 degrees. I dislocated my subtailor joint the orthopaedist said. Meaning, you should have broken it but you didn't.