I shoot quite regularly, so it is rarely on an urge or impluse. Actually, if I'm in a bad mod, I'll usually skip a session. I've gone to matches after a bad day at work, done poorly, and been in a worse mood.
Back before my knees went, if I was stressed, I'd run. I remember one night in college during exams, I went out for a couple miles, and came back about ten miles later.
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It's not that life is so short, it's that you're dead for so long.