There's a reason why your parents always said "Don't run with sharp objects in your hands." Playing with knives is dangerous and unfortunately these kids learned that lesson the hard way. 15-year-old Eli Gregg was playing with some friends when he fell onto a 10-inch knife that became lodged in his brain. He is lucky to be alive!! The doctors said "it could not have had a pound more force on the knife and him survive the event." Check out the x-ray.... that's a terrifying event but thankfully he's ok!