Here's the deal:

I'm a sub. I fill in for you when you call in sick, go on vacation, pop out an ankle biter, whatevs. Most of the time I Cover the position after you've been fired. Why did you get fired you ask? Because I had to fill in for you.
When I arrived your cart was an utter fucking mess. So I cleaned it. Then proceeded to scrutinize your building with greater attention than your supervisor paid his last 3 visits. Then I report to your supervisor's supervisor and he complains to your supervisor and shit flows downhill my dear.
So! If you are going to call off work, your account better be immaculate.