At Tokyo Designers Week 2010 Jack Chang and Joshn Cheng came up with a happy-trigger concept to turn out the lights called the 'Bang Lamp' by bitplay Inc.
This lamp needs to be shot at to turn the lights off. In addition to aiming a toy gun at it the lampshade also knocks off to an angle showing that its been hit. Firing it once more turns it back on. The Bang Lamp by bitplay Inc. is pistol-whipping fun.