As I exited Amtrak at Philadelphia's 30th Street Station and made my way to the escalator destined upward to the grand train lobby, the oddest thing happened. The moving staircase that was still packed with people heading down to the train platform suddenly changed direction and started heading up.
Like a scene from an embarrassing YouTube clip, surprised passengers stumbled over their own feet trying to walk down the up staircase while spectators laughed out loud. Then all of a sudden, the
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