Electric toothbrush

Now this is a random question.. but have you ever brushed your teeth with an electric toothbrush whilst looking at a digital clock? Well I don't usually, but I noticed this yesterday when I walked out of the bathroom to escape the dandy-long-legs..

The display of the digital clock looked as though it has really bad interference.. I wondered what had happened to it, went over to have a look and took the toothbrush out of my mouth, only to discover it had stopped. I never realised how much an electric toothbrush actually vibrates your skull! It was only then I noticed when looking around at other things how blurry they were too. Wierd.