The Equalizer Music Hat means you can now annoy your fellow commuters not only with the dum-dum bass sounds from your MP3 player, but also with flashing lights searing into their eyeballs as they try to read the paper. Win! Just plug the thing into your player and smile as people glower balefully at your warm musical noggin. £19.99.
As well as being a top Sound Hat ready and waiting to keep your bonce cosy and fill your warmed ears with your favourite music, the hat also incorporates a pair of sound reactive blue luminescent displays. As your music plays, the displays light up EQ style with the beat. The bars react to the volume of the music, lighting up more bars for louder music and fewer bars for quieter bits (turning your Metallica albums into something of a light show, no doubt) .
I bought one of these music hats, but I had to return it because the Government was putting subliminal messages in the headphones.