While attempting to pry bent ladder on PC4000 over to lower it to the ground. Technician 1 was using a 36"" pry bar, it slipped and fell approximately 6 feet striking Technician 2's (IP) hard hat and mouth, splitting both IP's lips resulting in 6 stitches total, 4 in the upper lip, 2 in the lower lip. Doctor cleared IP to return to work on full duties.