I don't drink, mainly because I'm not going to be 21 until November, but I have been extremely tired while programming before. One time it was like 4 in the morning and I just wanted to get my app to build successfully with no errors. I got that to happen, then went to bed. When I woke up seven hours later, I went back to work on the app some more, and I had no idea what I changed when I was borderline asleep to make the app build successfully. Go figure.