Faking it - Orgasms, iPods and more

Going to work today I realised that I was in the elevator with my iPod's earphones in my ears but no music. I had forgotten to push play (or tap play in the case of the iPod touch!).The most interesting thing happens in an elevator when people think that you can't hear them, they immediately assume you can't see them and that you don't exist at all.I have definitely done this before and on purpose to try and catch people unawares. I have managed to catch some interesting info out while people think I can't hear them.My question to you is:What do you fake? Anything at all? Nothing? You aren't a faker? I want to know if it's an orgasm or an illness.