I haven't experienced this one but saw it on the internet and thought it was hot.

The male was standing on one leg with arms secured from above.
The other foot was brought up and his ankle was attached by a short tether to a ball parachute.
He was not allowed to rest the upraised foot on the supporting leg for a specified time or he would be put back into chastity.
The domme harassed him and added weights to the foot throughout his ordeal.