What is black and sits at the bottom of the stairs? Steven Hawking after a house fire.
Why would you say that? What is the issue you have with disabled people?
You know, if his house was on fire, he would tumble down the stairs trying to get out. Don't worry. It's just a joke.
You shouldn't make fun of someone hurt in a fire. You are also talking about a disabled person so this is very upsetting for anyone who is disabled to hear.