Scene: Me, sitting in front of work computer, staring blankly, listening to a beep.

Boss:  Uh, Terry.
Me: Yes?
Boss: What are you up to?
Me: Mourning.
Boss: Mourning?
Me: Yes.  Hear that beeping?
Boss: Yes.
Me: That’s the sound of the UPS for my computer failing.  The first time, it went off, it was before a save point in the 20 page work order I was doing.  I rebooted the computer once power returned to find the auto-save copy nearly empty as it had occurred either during a cut/paste or while I was pulling pieces together from other documents, erasing my progress.  The second time occurred just now and I figure the most productive thing I could do is stare blankly at the screen until my urge to kill subsides.
Boss: Sounds good, I’ll check in with you later.

I love having an understanding boss.