Seeing as though you're not supposed to drive after having those drops in your eyes, I wouldn't prank anyone with them. They could get in the car and take off, being none the wiser, and get fucked up hardcore.
LOLZ EXTREME JACKASS
"I'm a dog chasing cars. I wouldn't know what to do if I caught one. I just *do* things. I'm a wrench in the gears. I *hate* plans." - The Joker http://pressthenyckbutton.blogspot.com/