When his quads gave out, that's when Vince's career as a sports entertainer were over. He no longer had the burst. He couldn't strut like in his prime. He became a bench warmer in the Gorilla Position.
I didnt see this live, but this is one of the weirdest and funniest things that's happened with Vince. He's still in Mr. McMahon character even sitting down with the torn quads, and he's acting like he's sitting down for some other reason.