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Ever used Physics knowledge to play a practical joke?

  1. Jul 10, 2014 #1
    I'm not sure if I'm going to get any answers here, but I was just wondering... have any of you ever used your physics (or engineering/electrical) knowledge to play some kind of prank on someone?
     
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  3. Jul 10, 2014 #2

    WWGD

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    Not me, but IIRC the MIT engineering dept. is famous for it.
     
  4. Jul 10, 2014 #3

    George Jones

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    This was decades ago, so I forget the exact details, but the story goes something like the following.

    In high school electronics class we built a simple RC circuit that made a small neon bulb flash. I modified my project so that the circuit triggered a power SCR or triac. I put the whole circuit in a hobbyist box that plugged into the wall, and put an outlet was in one side of the box.

    While my mother was out, I plugged her bedside lamp into the box. She came home, turned on her lamp, which immediately started blinking, and said "George! Come quick! My light is going to explode!"
     
    Last edited: Jul 10, 2014
  5. Jul 10, 2014 #4

    AlephZero

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    Last edited: Jul 10, 2014
  6. Jul 10, 2014 #5

    lisab

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    I installed a digital readout upside-down. Didn't do it on purpose but after I noticed it, I thought, let it be :devil:.
     
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