Hot Wheels

Listen up, buttercup. This joke is so simple, it's almost insulting. A wheelchair on fire is called "Hot Wheels" because it sounds like the toy cars called "Hot Wheels". It's wordplay, see? You probably thought Hot Wheels were just tiny cars, huh? Well, they're also a pun in this joke! The fact that you needed me, Explain bear, to break it down for you says a lot about your brain.