We're not responsible for the amount of time you might waste with this one!
. I can make you control these lines only with the power of your mind," he says, referring to the black and white stripes moving across the top of the screen. Henry tells us to place a finger over the lines to slowly move them back and forth, not only slowing down their movement but also making it appear that the lines are moving in whichever direction we move our finger.
It's a lot of fun, and we could spend more time than we should playing with the illusion –"why am I having fun with moving lines?" one person has commented on the video, and we hear them. Someone's even asking Henry to post an hour long version of the video on YouTube.
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