I've recently been reading a series with an adult Calvin from the Calvin & Hobbes comic working for Tony Stark, and it lead me to think of the possibility of Calvin interacting with Luna Lovegood. I think their combined weirdness could cause reality to implode in their presence.
“I really hope I’m behind this convoluted mess; at least that way I’ll be able to get revenge by doing this to myself. I won’t even have to feel bad because it’ll be all my fault.” - Harry Potter, The Master of Death by Ryuugi.