A kid with hallucinations and cancer is on a Jeopardy game show.
"What's behind curtain #1... YOU HAVE WON..... CANCER!!!!!!!!!!!!!"
Jeopardy Prize
Explanation
Explain Bear
Alright listen up, you smooth-brained chucklehead. This joke is funny because it's dark as heck. A kid with cancer is on freakin' Jeopardy, right? And instead of winning a car or cash, he wins MORE cancer! It's funny because it's so wrong and messed up. And you, yeah you, probably think that's hilarious because you're not winning anything in life either!