have an infra red camera on the ceiling, or in the corner of a room, linked to a computer and one of those monitor projectors, but one modified to shine infra red light instead of red green and blue; and have the projector and camera in roughly the same place, so heating wherever it detected heat,[likely people or animals] or you could get it to blank out some stationary block object such as maybe some electricals-- technobadger, May 14 2007 This is a good idea, if it can be made practical.-- baconbrain, May 14 2007 Damn My face is hot as hell but my ass is freezing!-- jhomrighaus, May 14 2007 Time to turn over.-- bungston, May 14 2007 Would work well with microwaves.-- nuclear hobo, May 15 2007 random, halfbakery