Skull Bike Bell!

Cool! > brass bell with attitude!! There's no substitute for a good old-fashioned bicycle bell when you really want other people to get out of your way. The Skull Bike Bell uses centuries old, tried and trusted technology: A compact brass bell with sprung thumb lever. Good and loud and guaranteed to startle the most oblivious cab driver. The subtle skull detailing is a nice warning for other road users that you mean business. A great gift for a Hell's Angel without a motorbike licence (price: €14.75)

http://www.suck.uk.com/products/skull-bike-bell/