Half an hour later

Just as you thiught, his scream fills the air as he falls on the rail. Going back into the main room, you can see both of his balls trapped under him, crushed by his own weight. His musckes had tensed, so he was still on it when you get to him. Grabing his left nut, you use it to pull him off, squeezibg it tightly ignoring his screams of agony. He was frozen from pain, his brain overloaded from it, so you have no issues spreading his legs. Deciding against the kicks, you decide to just yank his pants down and use his sack as a speed bag instead. The momentum has his balls flying back into your fist as you swing harder, forcing them to smack against the glass behind him. They would mushroom around your fist just to pancake against the glass and return back to you for more. His face was scruntched up in agony, his body trembling as he groans and moans from the agony forcing its way through his body. Eventually, he unfreezes and just falls unceremoniously into a heap on the floor, writhing around in agony as his balls swell. You think they looked bruised, too. Still, you need to step it up. You weren't at Val's level yet.