IndustrialMany people aren't aware those big garage doors they have on loading bays and such are held up by a spring. This is what happens when that spring fails.

submitted by ElonMuskOfficial from (gfycat.com)

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[–]ElonMuskOfficial[S] 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (0 children)

I remembered this from an old reddit post. A guy in the comments who claimed to be a technician for these kinds of doors said these springs fail after about 100,000 cycles. My guess is that these doors usually probably fail in some other way before this and the hardware gets replaced or the doors are supposed to be scheduled for regular maintenance and inspections. Plus, it just adds another layer of coincidence for someone to be standing directly under it when it fails.