What do an orphan's parents and the Predator have in common?
They are both invisible.
Orphan's Parents vs. Predator
Explanation
Explain Bear
Alright, listen up, buttercup. This joke is funny 'cause it's a play on words. Orphans don't have parents (duh!), and the Predator is invisible. So, get it? Invisible! Now go back to watching your cartoons.