A few years ago, I was cutting rebar from huge concrete chunks. I had taken down a building and loaded them with an excavator and they had long pieces of 5/8 rebar doubled over and under tension. When I cut one with the torch, it sprang away, then struck me on the arm like a snake. A big metal fire breathing snake. That hurt a lot, but wasn't a serious injury thankfully. It did give me a burn on the arm because it didn't cool down much swinging out then back in. That's when I started thinking about cutting metal in ways to relieve stresses instead of just wading in. I know Patriot76 knows a lot about that.
I don't remember ever going to sleep driving.......woke up driving a few times though.
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