# What causes this video effect?

**URL:** <https://boards.straightdope.com/t/what-causes-this-video-effect/558837>\
**Category:** Factual Questions\
**Created:** [October 29, 2010, 11:31pm UTC](https://boards.straightdope.com/t/what-causes-this-video-effect/558837 "2010-10-29T23:31:55Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![jasg](https://avatars.discourse-cdn.com/v4/letter/j/f0a364/32.png) [@jasg](https://boards.straightdope.com/u/jasg)\
**Post date:** [October 30, 2010, 10:36pm UTC](https://boards.straightdope.com/t/what-causes-this-video-effect/558837/21 "2010-10-30T22:36:27Z")

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Those are very flexible dancers 😉

Thanks for the great explanation - I learned more about an intriguing subject.

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**Author:** ![jz78817](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/jz78817/32/1028_2.png) [@jz78817](https://boards.straightdope.com/u/jz78817)\
**Post date:** [October 30, 2010, 11:30pm UTC](https://boards.straightdope.com/t/what-causes-this-video-effect/558837/22 "2010-10-30T23:30:14Z")

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> [@ramel](#):
>
> This video explains what’s going on
> 
> [http://www.youtube.com/watch?v=T055cp-JFUA](http://www.youtube.com/watch?v=T055cp-JFUA)

thanks for posting this, it clears up a few questions I had.

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