Looking to pull your friends leg? Try this application. Select the image you want to display. Point the screen towards your friends face and click on start button . That will allow you to run scan effect. A countdown is triggered to make your friend believe his/her face is scanned from scree. Then watch the reaction.

You can try this on anyone.

If you think something could be done better then please send me your comments. Hope you will have fun.

Screenshots: