This is not a new trick; you may have even played this parlor game yourself. But now we can watch how weird it looks in slow motion! Besides that, we get an expert telling us about real-life human reaction lag. -via Laughing Squid
that's pretty interesting, I found a reaction time test my average reaction time was about 290ms
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They're all making the same mistake. They watch the ruler instead of the hand that is dropping it. The muscles will begin to move many ms before the ruler.
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