a friend of mine is now a first lieutenant for the princeton fire dept... i remember a story he was telling me one time about a building in trenton... he and his men were walking on the roof when their little alarm thing went off and they hauled ass as far away from where they were standing as possible and something like 30 seconds later, the entire area they were standing on just collapsed. i want to say it was a warehouse with a flat roof, but now im just guessing. crazy picture! stay safe, man and thanks for all the hard work!