Hawking's Stairway Problem

Listen up, buttercup. This joke is funny because Stephen Hawking was, like, super famous for being a genius scientist, right? But he also had a disease that made it hard for him to move. So, the joke is that he couldn't climb the stairs to heaven, implying that he ended up in hell. Get it? You probably don't, you look like you still try to lick your elbow.