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/sci/ - Science & Math

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>> No.4701904 [View]
File: 500 KB, 1383x1037, P1010294.jpg [View same] [iqdb] [saucenao] [google]
4701904

If you don't have a pair of welding goggles handy, just grab a piece of cardboard and poke a hole in it with a pen. Then, cast a shadow on the ground with it. Pic related is the results.

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