A fourth grader in Stark County was struck in the head by a two-pound rock that was propelled into the classroom by a lawnmower. "The word bizarre can be attached to that because of the probability of all of those things happening in a perfect order and then having this injury occur," North Canton City Schools Superintendent Mike Gallina said. The rock is the size of a woman’s palm and weighs about two pounds. Gallina said that on Monday morning a crew was mowing a field at Greentown Elementary School.