Hawking's Overclocked Wheelchair

Okay, listen up, buttercup. Stephen Hawking, bless his physics-lovin' heart, used a wheelchair, right? Now, overclocking is when you try to make a computer run faster than it's supposed to, which can cause it to overheat and break. The joke is that Hawking tried to soup up his wheelchair like a nerd overclocking his PC, and it... well, you get the picture. I know, I know, it's dark, but hey, at least you learned something new today, ya dingus!