Was at a get together where one of the attendees brought his own chair. It exploded under him. Not a great situation to be subjected to. It was a BBQ and a bit half-and-half BYO food and alcohol but the hosts were laying on some of the spread anyway. He rolled up to the grill with a huge family pack of assorted meat as I was finishing up my own stuff and I thought "Oh, that's nice, he's brought extra for everyone in case there was a shortfall" (you know, taking the load of the hosts and all that). But no. He cooked and ate it all. And his chair, that he brought because it had a higher than usual weight/load rating, just fucking exploded under him. Instant catastrophic failure. Like a shotgun blast out of nowhere, at close range. Thankfully none of the debris fired up into his body, so we were spared bloody carnage. Everyone was able to just embarassedly look down into their lunch while me, the host and one of the other fitter dudes helped him get to his feet. He waved off anybody calling an ambulance and went and sat on a double-brick reinforced garden planter after that, and even then the host confided in me later he got seriously worried that he may not have built it well enough to handle that sort of strain. He'd just never considered that this guy was that heavy and it had freaked him out.