중국 학교의 터치스크린 칠판/정의의 심판/달인/저런! VIDEO: Neat Chinese touchcreen blackboard/Justice/If you take your bowling ball to the skate park,/How unlucky you have to be

Neat Chinese touchcreen blackboard

Justice

If you take your bowling ball to the skate park, you need geometry and phisics to turn a normal throw into a stunning trick shot

How unlucky you have to be 

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