I was once doing a standby at a major house fire when a stairwell collapsed under a fire fighter and they fell into the basement. They pulled him out and brought him over to the ambulance so we could transport him to the hospital. I think his major injury was to his pride. He kept complaining though that Humpty, a fellow firefighter was on those stairs for a half hour with no problem, he was on them for 5 minutes and they collapsed. Why did this matter, well Humpty was so nicknamed because he was kind of shaped like an egg and weighed roughly 300 Ibs., while the injured fireman weighed half as much. As I said, I think his major injury was to his pride and that the stairs didn’t collapse under Humptys perceived greater bulk.