Spooky swings at playground

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PB
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Spooky swings at playground

Post by PB »

I compile using 5.31 (x86) on Win 7 Ultimate (64-bit).
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Beach
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Post by Beach »

That is wild. If its not the wind, magnetic pull, or someone making them move with a long fishing line... then what the hell is it?

Thanks for finding that one. I have some friends that are going to love it.
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Post by Demivec »

I would think that the cause is actually earth motion translated to the supporting legs, this movement would pull the swings from the top, not the bottom as would commonly happen with wind or "string tugs". The earth motion can be cause by "nearby" vehicular traffic such as a highway for instance or bodies of water such as oceans. It could be exaggerated by the depth of the supports and the firmness of the underlying foundation (i.e. rock).

The swing only has to be in harmony with the motions to have them add up and produce the result. The chance of harmony would be affected by the swings position on the structure (the distance from the supporting legs to it's overhead attachment) and also by the length and nature of it's supports (chains).
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Post by idle »

lol amazing what a bit of wind will do, though if it wasn't wind and wasn't caused by passing trucks vibrating the ground or some dude with a fishing line I'd probably become all religious

its windy

http://www.youtube.com/watch?v=l54W2gM- ... h_response

http://www.youtube.com/watch?v=f1QpvBGnv2E&NR=1
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Post by pdwyer »

This video is from a commercial that was filmed in Europe. When the commercial was finished the editors noticed a white mist floating around the car after it came out of the trees. It is difficult to see but if you look closely you can see the mist that caused the commercial to be pulled. Click below to watch.
http://jp.youtube.com/watch?v=EeNgGpLucgM

Check this out for freaky! Helps if you have headphones
Paul Dwyer

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PB
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Post by PB »

It's great footage though! :)
I compile using 5.31 (x86) on Win 7 Ultimate (64-bit).
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Re: Spooky swings at playground

Post by aaron »

At 50 seconds in the first video you can see the wind pick up a plastic bag (or something) in the background and blow it away at high speed.

The wind is making that swing move.
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Post by djes »

It's a dead child, killed by a wild dog, back from the ground. He was just 4, and never really wanted anything but play ; so time to time he's coming back to this place where he had fun, before.

PS: We'll see if there's a replicant among us :)
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Post by Rook Zimbabwe »

OK now I will tell you the one about the schoolbus in Mexico...
Binarily speaking... it takes 10 to Tango!!!

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http://www.bluemesapc.com/
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Post by srod »

It's okay, Mulder and Scully have been informed and are on their way!
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Post by SFSxOI »

Another case for The Fringe team. :)

My Guesses:

1. Materials expanding and contracting at uneven rates as a result of temperature differences in the metal and small upward thermals created by ground moisture evaporating. The thermals are warmer nearer the ground and as they rise it varies the temps along the chains of the swing vs the temp of the surrounding air causing them to be slightly different in temps along their length thus expanding and contracting at a different rate along the length of the chains. The chains holding the swings are also not exactly the same length which accounts for the twisting and sidewards motion (which implies that either a mistake was made in measurement or they were set that way deliberately for this trick). I'll bet if they replaced the chains with rope you would not see this happening. The shape of the seat also helps as it already provides maximum air current resistance from the top and bottom, which means different air density at the tops and bottom of the seat, such a difference causes lift which adds to the initial movement to get things going. The denser moist air from evaporating ground water creates thermals that hits the bottom of the seat and the lighter air at the top of the seat helps induce a small amount of lift, the swing starts moving, and the differences in temp along the chain keeps things going. Its the long train effect; why very long trains need an initial jerk to start the whole thing moving - the seat lift is the jerk and the expansion and contraction is the power that keeps things moving. The time limits it gives of 5 to 10 days also coincides with water evaporation actions in cooler/colder weather as you notice people are wearing coats in some of the videos. Water evaporates over a longer period of time in cooler/colder weather but it still evaporates, the sun hits it or the air warms and small thermals are created. I'd be willing to bet that this doesn't happen at night, you notice that its daylight when this happens, thus accounting for warmer air or sunlight activity to produce the thermals.

or....

2. Vibration from nearby traffic.

or...

3. The result of the exploding star in the Q3 quadrant near the crab nebulae.

or.....

4. It could be the ball bearings, yep, thats it, the ball bearings. Who woulda thunk. :)

or....

5. Its the internet, what did you expect. :)

(number 1 is my best guess - i'm not saying its correct mostly in case i'm wrong :) its just a guess thats all, besides it does sound pretty good and explains everything :) )
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