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B Spiral piece of wood moves upstream

  1. Aug 12, 2018 #1
    Hi I have found a video which is composed of 2 videos. In the first one you can see that a spiral branch is put into a stream and starts to move by itself in a snake like motion.

    In the second video similiar spiral piece of wood is floating in a container and then water is poured into it and it starts to move upwards the stream of water. How's that possible? Thanks

     
  2. jcsd
  3. Aug 12, 2018 #2

    sophiecentaur

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    i wouldn't be surprised if a bit of string was involved.
     
  4. Aug 12, 2018 #3

    Dale

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    That was my thought too. I can’t see the string, but it certainly moves as though it were being pulled by string.

    The first one, in particular, seems like string. There is a wake, and they carefully avoid showing the front end of the stick before it is submerged.
     
  5. Aug 12, 2018 #4

    sophiecentaur

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    Illusionists use fishing line. Fish can’t see it either.
     
  6. Aug 12, 2018 #5

    berkeman

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    Since we don't debunk pseudoscience or fake videos, thread is done.
     
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