EE moving steel plate on 2 metal saw horses with wheels. Sliding on concrete floor of shop. Wheel caught and horse flipped, plate fell on feet. Coworker lifted plate off. Sitting in chair & said ""he felt like he was going to pass out"". Passed out for 20 sec. Transported to hospital by ambulance. EE wearing steel toe boots. Treated in the emergency room for a broken toe, left foot.