Afraid to be caught with the smell of alcohol on their breath, many kids have taken up the vodka eyeballing trend. Instead of throwing back a shot, teens hold the bottle to their eye and pour the liquid directly into the eye, which is laden with blood vessels. Here, the alcohol is quickly absorbed through the mucous membrane and enters the bloodstream immediately through the veins at the back of the eye. Eyeballing may yield a quick buzz without the bad breath but there can be extreme consequences: Because most vodkas are between 40 and 50 percent alcohol, it can scar and burn the cornea, and even cause blindness.
Image: (Photo by Craig Barritt/Getty Images for Tribeca Film Festival)