@mala, done and done. It was a summer job during undergrad, the only thing dangerous I work with now is a computer/desk combo that is slowly making me fat (diabetes, here I come).
I'm really completely out of all that, like I said, and it's made me a much calmer person. As before...condolences, I can definitely empathize with you guys who have it rough, I wasn't trying to one up, just share, but you'll make it through. Moreover, we all start playing for higher stakes the longer we're in this game (wife, kids, career, mortgage, impending frailty/death, baldness, incontinence). So take care of yourself now, plan for the future, and eat brocolli.
Also, Madster, getting seven nights of sleep will greatly improve your life. Cut your No-Doz by 25% each week and just start sleeping, bro. (That's eight less boring hours a week.) On top of that, even though your body can run for long stretches like that it doesn't mean you should. You're definitely screwing with your hormone levels by staying up so much.