h a l f b a k e r y
Replace "light" with "sausages" and this may work...
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Admittedly this has nothing to do with lasers, though that would be cool
It's pretty simple:
1) Spray face of Billiards table with a pressure sensitive paint.
No pressure and the paint stays green. Apply pressure and the paint changes yellow for a moment or two.
2) Play pool, and admire the cool lines that trace your shot, and liven up the table.
You could use this stuff
Though I think the weight of the balls won't be enough... [theleopard, Sep 09 2008]
||You might do it with the video of the shot.
||neelandan, how do you mean?
||Aim a video camera at the table. Process the video signal by computer to add trails behind the balls as described.
||Each ball could be programmed to have its own coloured trail.