The LED Invaders Door Mat lets the world know that you are not interested in conversations unless they involve the speed of light, Area 51, Philip K. Dick or animatronic versions of Barbara Streisand. $69.99.
This nifty doormat is imported from France and features a glowing display and motion sensor. Any time someone comes near, a glowing green space invader moves back and forth across the top of the mat. Potential guests, having left their phasers at home, will usually run shrieking in fear.
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via http://www.7gadgets.com/2007/09/18/led-door-mat/2313
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