Crazy visual trickery. Cool physics lesson too.

[Secure Da Bag]

Steel balls moving in synchronized circle

 

[jdubnyce]

More vids

 

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Scientific experiments you can do at home that seem like magic

 

[Secure Da Bag]

perpetual flying paper airplane

 

[boogers]

L shaped water barrier never tips over

man i wanna make my own portable swimming pool with one!!

all you'd need is a stack of those and a couple tarpaulins.

 

[BuckFilly]