Interesting video. One step at a Brooklyn subway is a fraction of an inch higher than the others. It causes nearly everyone to trip on their way up.
Posted by
Krusty (aka krustylu)
Jun 27 '12, 16:40
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I've known this could be an issue but I've never seen it proven in an experiment.
There's an episode of the BBT where Sheldon mentions doing it as an experiment and his father fell and broke his collar bone but that's a fictional show.
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