...because I'm a disruptive employee that can't follow explicit instructions to take time off.
No that's not entirely it ;-)

You see, I've got deadlines, the office is nearly empty - and daytime TV is to painful to watch. All three are incentives to get my butt in gear and get work done - regardless if I'm supposed to be on vacation.
Truth be told, Brenda is 38 weeks pregnant (full term is 37 weeks) and could deliver at ANY TIME NOW. So it would be in the best interests of the Gant chart that I code like a crazy M#^43%F*CK3R while I can - because when the baby gets here I don't think I'll be that concerned with work.