what's black and still smouldering after a housefire ? a paraplegic
I have no idea how this "joke" is supposed to work. Do you have a problem with the disabled?
No, but yeah I guess what matters is the joke, not the meaning behind it.
Making a nonsense joke just to get in a gratuitous image of a disabled person dying in a fire because they were unable to escape is sadistic and heartless. You need to think about what you find to be funny.