marmite man myself, although been weened off it on to T*sco yeast extract "a delicious spread with added vitamins" dontyouknow.
There was a guy on Ebay selling optical theremins in Marmite jars (all the controls and the sensor were mounted on the lid), after a scare in a postal sorting office - full bomb squad event, he got a visit from MI5 and was told not to make any more or else - now that's some crazy shit