[chbot] OT ping pong balls at mach 1.2

Mark Atherton markaren1 at xtra.co.nz
Tue Feb 12 07:21:34 GMT 2013


Kerry just found this :

http://www.gizmag.com/how-to-build-a-supersonic-ping-pong-gun/26082/pictures#3

or is this Off Topic ?

-Mark




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