Here's a bad one...

I was just in the washroom at my workplace. The 3rd floor where I work is pretty dead (for the most part). So I went to the washroom and wanted to check out a bruise on my leg. So I pulled my jeans down and stepped out of the stall to check out the back of my leg.

Sure enough, the door opens and I panic and scurry into the stall with my jeans half down.

I was too scared to check out who it was. It could have been my boss for all I know.

Needless to say, I am mortified.