When the guy "woke up", he was already tide to it, hanging by his wrists, his leg spread apart, exposing his genitals and leaving them so vulnerable...
He nailed guy's feet to lower cross-bar and after a while, when he enjoyed the reactions enough, he continued with nailing wrists.
He didn't hurry, so it took almost an hour before he put a loop on the guy's ballsack and put a weight on it... Another pleasing 15 minutes of moaning and sobbing.
Then a long and rather thick nail was driven through the victim's restrained and pressed balls. For a while he was considering gag.... but then he decided not to.