When coding, one may get into the deep hack mode. At this point, you forget everything around you and become one with the code. Nothing exists any more except for the problem you are working on. In this zen-like state, you may not only solve your problem but achieve this better than you would ever have imagined. If you are not able to reach the deep hack mode, you will never become more than a mediocre programmer.
– “I wanted to see Dave, but when I started to talk to him, he just raised his hand and continued looking at the screen. I waited for 20 minutes for him to turn towards me, but he just continued typing. Does he hate me?”
– “No, he was in deep hack mode. You should be happy that you saw this phenomenon with your own eyes.”
(source: Urban Dictionary)