I just noticed that sometimes, my iPod Nano ignores my commands.
The play/pause button plays or pauses when you press it. A long press of the same button turns the iPod off. But what if my press is not quite long enough?
Well it turns out that the iPod is designed to ignore my ambiguous command, rather than risk doing the wrong thing. Did I mean "pause"? Or did I mean "switch off"? Interpreting this wrongly could be quite annoying.
So ignore me. It's a good thing sometimes.