At the tone, the time will be:
5:50 p.m. Big-Ass Project has been completed. I took a 10 minute breather and was talking to a co-worker and the boss approached me with the Big Boss in tow and asked, "Do you have a mechanical on [project for Big Boss that he gave me at 3:30]?"

No. I don't. Because I was working to finish Big-Ass Project. But now I look like a fool because I'm standing around talking instead of working.

I can't win!