already posted about it here    the device he was holding in his left hand (presumably his cellphone), was damaged and the lithium ion battery was reacting to the oxygen in the air, before totally being crushed a split second later. there's no way that is the phone's screen brightness, as if it was, you would have seen him lit up in all the frames leading up to the accident, and his distinguishing features would be nearly impossible to make out, especially while he was walking under a streetlamp with all that light saturation.
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