I was sitting at my desk, with my headphones on, listening to Siouxsie doing the Peel Show on Radio 1 (courtesy of this newfangled interwebnet thing). She was playing Nancy Sinatra's Bang Bang, which is rather good.
My phone rang. For some reason my subconcious mistook my headphones (two earpieces) for the telephone headset (one earpiece and a mic), so I reached out and pressed the answer button, and started talking. The headset, meanwhile, was happily sitting on my desk for at least a couple of seconds until my brain caught up with me, and I fumbled to change over.
And one of my colleagues noticed.
Maybe I should get my in-ear ones out, so I can wear both at once again ...