The next time you find yourself on an aircraft, sitting next to someone who just cannot resist chattering to you endlessly, and who just doesn't get that you're really not on the same wavelength...take your laptop out of wherever you keep yours and slowly, deliberately, very, very carefully open the screen (ensuring that the ever nosey, irritating person can see exactly what you're doing...then hit this link:
http://www.thecleverest.com/countdown.swf
http://www.thecleverest.com/countdown.swf