I was using my new gas powered Makita Demolition 14 saw with a metal cutting disk. I was trying to cut apart an auto frame, it got bound and exploded. I was wearing a chain saw safety helmet with the wire mesh and part of it went back in my face. The mesh shield held it was all bent up but I wasn't hurt, I learned to be more cautious and use a sawzall more that the gas powered cut off saw.