I don't work in an office but I did once, years ago, and I remember the horrible feelings brought to the surface every Monday the moment I walked through the front door of my place of business (it was a cross between severe depression and nausea).
Basically it felt like someone was eating my insides out and if I could only make it through the first couple of hours of my fellow co-workers, bosses and bad coffee, I would become numb to everything around me and fall into a waking coma that would hopefully last until 5pm Friday.
This was the dream.
Now, you may not be as adapt as I am in self-medicating yourself with a cocktail of sadness and DayQuil, but perhaps this video of a praying mantis eating a fly while David Lynchian music plays in the background will help you achieve a catatonic office demeanor.
And, if it doesn't, well, at least it will kill four-and-a-half minutes out of your day.