Being dumped does it for me. Right afterwards I tend to slam out code for about 20 hrs, then sleep. Repeat etc. Part of that is state of mind, part of that is lack of distractions.

Even in less stressful situations coding is my meditation zone. When I sit down and go into that frame of mind, I think less (or not at all) about my surroundings and worries about other things. It's necessary to be able to hold enough of the program in my mind. Enough for what? Enough to code it.

The downside of this is the severe grumpiness I get when somebody jolts me from that state prematurely.

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Jeremy
I didn't believe in evil until I dated it.