If you have always wanted to be able to fire crossbow bolts with the flick of your wrist, this homemade Wristbow complete with laser sights might be just the thing you need to go with your Batman ...

Patrick Priebe, a German lab technician, has built a hand-held crossbow that can pierce a drink can or smash a lightbulb from three metres away. The miniature weapon mounts on the back of your hand, ...