Hypersonic Ping Pong Ball

The video says "Do not try at home" - clearly I need to try this.

• http://www.youtube.com/watch?v=I9zBGgpzl0I&feature=youtu.be..
• http://www.technologyreview.com/view/510286/how-to-build-a-supersonic-ping-pong-gun/
• http://arxiv.org/abs/1301.5188