Laser Cutter Gas Containment Chamber
I saw this post over at the Make Magazine Blog. This is an interesting method of containing the exhaust gas on a particularly nasty material. It basically puts the work in a box with an IR transparent window. The box has a fitting to suck out the fumes. It uses a polished silicon wafer as the laser window that was bought off eBay.
I probably would have put it in a Tupperware box, because the seal might be better and it is probably more resistant to the nasty fumes. I could have used this when I tried my vinyl record cutting.