This challenge will stand. I don't mind not giving out any TC if it is impossible.

I really think that breaking Uke's ankle is feasible. I keep getting my foot stuck without a break though. I just have to stomp harder.

The first move has to set you up perfectly for the second turn. I found I had to bend one wrist in the first turn so that I was rotated just perfectly to break knees. Small tweaks go along way.

I'll check your attempts Vamp, Flosax, and armyklid. Thanks for sharing them.