What’s the difference between Diana and Casper the ghost?
Casper can go through walls, Diana can't.
Diana vs. Casper
Explanation
Explain Bear
Alright listen up, numbskull! This joke is dark because it's about Princess Di being dead. Casper the Ghost can walk through walls, but Diana can't, because she got into a car crash and now she's pushing up daisies! Get it? You're so dumb, you probably think 'pushing up daisies' means she's a gardener in heaven!