Assumption is the fastest way to self-ridicule... When will I learn?

Seeing Bruce Willis on the cast, I bought tickets to this movie because I wanted to be numb. Not thinking, not considering my options, not planning anything. Just stare at the screen blankly for awhile.

But this movie invoke thoughts. Between causality of time-travel events and murdering future criminal while they're still infants, the lightest one is this: what on earth is the name of the liquid drug that is taken by dropping it into one's eye? And I don't mean things like eyedrop solutions. The drug is the kind that can make you high.