This doesn't look like much, but if you look really closely, you can just see an orange led glowing it's evil little light.
What you are looking at is a fan assembly for a Sun T2000, which looks teeny, but that box supports about 200 of my users. So when the led comes on, and it starts spamming me with emails about the CPU Fan failing, I have the wonderful task of telling all the users, and even more fun... their managers, that they are going to lose the server for an hour or so. Of course it's redundant, so they can switch to another machine, and I got to give them about 18 hours notice, but still I had to go in at the last moment, and kick off half a dozen of them as we powered down the machine. (I know you don't have to, but Sun told me to)
The hand you see is that of our jolly, caffeine addicted, Sun engineer Jeroen who was, to say the least, a little non-plussed at me photographing him swapping out a fan.
All was well, the server is back up, and everyone is happy. (well... as happy as users ever get) and we even sneaked in a firmware patch while the machine was down.
Good story. The photo is interesting to the eye and yes, I saw the LED light. I can imagine your coworker's thoughts when you were taking photos of his hand - haha!