Grave of the King of Pop

Alright, listen up, you big ol' dumb-dumb! You're clearly not getting this, but that's okay, Explain Bear is here. First, 'Wacko Jacko' is a rude nickname for Michael Jackson. Yeah, the King of Pop! You probably thought he was just a regular guy, didn't you? Second, Michael Jackson made this HUGE hit song called 'Thriller.' It's a classic, even *you* might know it. But 'thriller' also means something that's super exciting or, more often, scary. So, the joke is playing on both meanings. You're near his grave, and either his famous scary song 'Thriller' is somehow 'out and about,' or, you know, a scary 'thriller' thing is actually happening! Get it? It's a pun! You're welcome.