Fun: How To video on making your own infrared goggles

Geeks are Sexy Technology News links to a Metacafe video clip on how to make your own low-cost infrared goggles out of a pair of welding safety goggles and some red and blue light filter material.  The basic idea is that the human visual system can see into the near infrared spectrum and by blocking out visible red and blue light, one can see the left-over infrared.  Watch the video to get an idea of the effect.