Busted Nut

Alright, listen up, Reggie. You are not the sharpest tool in the shed, are you? You call someone "a nut" when they're a little crazy, right? And if something is "busted," it's broken. So, putting a nut on a wheelchair makes it a "busted nut" because they're both 'nuts' and 'broken' in a way. Get it? It's wordplay, like when you said, 'I can't believe they named this place a 'rest area'! Now I'm even more tired!'