One of the things that happens after doing a strip long enough is that you find yourself backing into ideas. You start out at point A, and you end up at point B with no recollection of how you got there. The previous strip sets up this one, but I had little idea at the time of writing it that it would lead to a Lost joke.
So there you go, we’re less smart than one might assume.
HARLEY: Sorry, no can do Zack. What about that hatch in the top?
ZACK: Agh! It won't open!
FINN: I didn't want to go college anyway. Bunch of hipsters spouting nonsense about Rousseau and Locke that never adds up to anything.