By means of a miniature led projector (link) concealed within the hat, connected to an under-brim lens via fibre optics, the Subliminal Projection Hat can overlay a stored image of your face onto your actual face for the period of 1/25th of a second every five seconds. This will go unnoticed by observers but will leave behind the suggestion of the emotion portrayed in the stored image.
For instance, when holding two aces in the hole in a game of Hold 'Em you could set the hat to fire a stored image of "Disappointed Face". This will mislead players even if you have trouble hiding your delight.
In the linked image ("Man uses Hat") a man is shown looking baffled while negotiating a complex property deal. Below this is the same man a fraction of a second later while the Subliminal Projection Hat is firing a burst of his "Aggressive Samurai Face" This will leave the other party feeling defensive whilst unable to ascertain the cause.-- wagster, Apr 01 2008 Miniature LED projector http://www.pocket-l...ctor-p300-dlp.phtml [wagster, Apr 01 2008] Man uses Hat http://images.wagst...%2Bzw&nmid=55272641Note suggestion of imminent violence. [wagster, Apr 01 2008] Responsive Face http://mrl.nyu.edu/~perlin/facedemo/I'm sure this s/w might come in useful for someone designing the product [Dub, Apr 03 2008] I'm feeling defensive... but as I am unable to ascertain the cause, I conclude that it must be because I have witheld this croissant from you for too long...(+)-- Jinbish, Apr 01 2008 Bun for the Man using Hat! +-- xandram, Apr 01 2008 Need it.-- 2 fries shy of a happy meal, Apr 02 2008 Can we have one with a laser on the side to bling people in the eye ? [+]-- 8th of 7, Apr 02 2008 A great hat idea.God, I miss [FarmerJohn][+]-- coprocephalous, Apr 02 2008 [8th] "Ow! I'm Bling!"-- hippo, Apr 02 2008 I don't know whether to smile or frown-- Dub, Apr 03 2008 Now you can do both!-- wagster, Apr 03 2008 Nod nod, wink wink, wink, wink, wink ... oh no! it's stuck! +-- xenzag, Apr 03 2008 Best idea I've seen here in months.-- RayfordSteele, Apr 03 2008 random, halfbakery