eyeball

This isn't for the faint of heart, it is also not a suggestion to attempt popping your eyeball out of its socket. Source: MSN

There was always that kid in middle school who could turn his eyelids inside out and creep everyone out. Eyeballs are just kind of gross, I guess. Other than putting in contact lenses (and even that sicks some people out)  don't be touching your eyes. This guy goes beyond touching them. He sticks nerf darts to them. Yes, on his eyeballs!