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Table-top Particle Accelerator Created
holy_calamity writes "French physicists have built a desktop particle accelerator. It uses a pair of laser beams to precisely control the acceleration of electrons within a plasma. It has the power of a device that usually takes up a whole room and could lead to new medical treatments. They don't mention the potential for experiments like 'what happens if I put my lunch in front of a 300 megaelectronvolt beam?'"
In fact, you probably have a table top particle accelerator in your house. http://science.howstuffworks.com/atom-smasher2.htm
Yes, a CRT is also considered a particle accelerator!
-- these are only opinions and they might not be mine.
Don't forget all of the other stuff you get from spalling, like high energy X-rays. Actually, at 300MeV, I'd wager on getting a fairly decent gamma ray beam. Without a purpose built collimator, I'd guess that there'd be a good amount of "spray" all over the place. So you'd probably get a hole in a radioactive sandwich, plus a good dose of radiation just for standing nearby. Yes, a healthy dose life-giving radiation.
Remember, the Therac-25 system was quite lethal when it malfunctioned, and it "only" used a 25 MeV beam. 300MeV is a LOT of punch per particle, and if the intensity is high enough all sorts of nasty things will happen.