Cubicle Coma:

When you wake up and feel engergized but as soon as you enter the work place, a wave of exhaustion runs over you and you have trouble staying awake for the rest of your work day. Amazingly, once you leave the hellish work atmosphere, you suddenly feel energized and ready to run a marathon.

As soon as I sat down at my desk this morning, cubicle coma came over me and I immediately passed out. An IV coffee drip could not pull me out of it but as soon as I walked out to go home, I felt like I could do an iron man.

From the Urban Dictionary