lol You know there is an actual light saber that will cut through stuff and everything. I dont know specifically how it works, but it consists of a long thin rod going out the centerand opening in a lead disc like this
"==--------|" where the -- is a rod, and the | is a disc, and = is the handle
And the handle sprays out a continuous burst of some sort of hydrogen gas that is super heated but not set on fire by a laser that ends at the lead disc.
Well the only gas that is hot is the stuff that the laser goes through and it can cut things from the side. Cant stab though =\ Imagine if the disc wasnt there though, just have like, a cutter that goes for as far as the gas.
My friend has an article on it, I'll have to ask him about it. Wonder what stops the super heated gas from spreading out, maybe it cools as soon as it gets out of the laser beam *shrug* I want one ^_^ lol