Put some plasma in your pocket, or rather, on your pocket with this dashed handy plasmatronic lighting display device. It has all the inspired functionality of the original plasma ball, but, at just 7cm in diameter, comes in nifty miniature form and will clip on to practically anything. Not content with randomly generating its multifarious lightning bolts or responding to your touch, this gadget responds to sound, from the quietest squeak to the boomiest bass-bin tremble. Gosh. Take it to the discotheque, rock out to some hip-type beats and watch your plasmatron spring to life in time to the 'music'. Take it to the library, cough a little, and watch it perform a merry visual dance to coordinate with your every whisper. Clip it on your belt and it will happily do its plasma-type business all day long wherever you happen to be.

Now you know the answer to the question 'Is that some plasma in your pocket, or are you just pleased to see me?'. Just give the lady in question an arched-eyebrow and a knowing look... then fire out a bolt or two of multicoloured lightning in her general direction.