A close friend of mine works for a company that makes entry materials for the Police/Military, because of that he got an opportunity to go to an "Entry Expo/Convention" where he told me there was a lightsaber-eqsue entry tool they were showing off, along with a plethora of explosive devices and rams (the large warehouse was filled with cement and metal walls for the demonstrating of each of them).

It was essentially a rod (it was made of a material I am not familiar with) with a handle, attached by a hose to a special formula tank.

When activated, he said, it had a very luminescent glow and corona (the glow being the superheated gas and the corona the bar) similar to a lightsaber.

He told me that the guy demonstrating it sliced straight through a 3 inch steel rebar.