This is the ultimate fun application!
Frighten your brother or your sister, parents, friends or your entire neighborhood!
How it works:
Firstly, put your sound-settings on highest level possible!
Now explain to your victim that youve got a incredible new app that shows an optical illusion and that something will show up in the middle of the screen!
Your victim should concentrate and stare at the image at least for 1 minute. After a few seconds, your victim will be shocked!
(This effekt works the best in a very quiet environment)