This is a subject I think everyone can benefit from - ways to stay safe when "playing with fire". To most of you (I hope) these may sound ridiculously obvious, but when I first started out some of them didn't.................... A lot of things are pretty basic, such as safety glasses, keeping a fire extinguisher close at hand just in case, and using stands rather than jacks to support a vehicle you're crawling under. Grinder guards are one I learned the hard way . I was using a 7" angle grinder to clean up some areas where I had been cutting on my truck deck. Kneeling down & working around the trailer hitch, I had the grinder jump back at me when I got into a tight spot. First point of contact: my left knee. Had the guard been on there, it would have startled me. Since the guard WASN'T on there, it opened the knee up! (When I was in for my last driver's medical, the doctor saw the scar & asked if I had ever had knee surgery. "Well, I guess you could say I did have one round of exploratory surgery............" Since I get to work around machinery a lot, one thing the old hands taught me early on is "Don't trust hydraulics!" Even the average pickup plow can do a lot of damage if it drops on your foot - imagine one of the big DOT units doing that! Drop the blade first or block it up before going to work. Another real danger is dump boxes. Many times we've done repair work on dump trucks, always block it to make sure the box can't creep down while you're working. With the shield down & the arc going, you'd never hear it coming. Tomorrow I get to climb inside the pit's impact crusher & do hardfacing. The top portion of this unit lifts up with hydraulic cylinders for access, so I'll have to make sure it's blocked and/or chained to keep it from lowering back down "just in case". (As well, the power source has to be locked out before starting work) And, the rotor which I'll be doing the welding on also has to be wedged to keep it from turning. Just the rotor's own weight going around is enough to reconfigure a leg............ More ideas on how to stay safe on the job to come - looking forward to hearing your suggestions.