The App is called Knocking Video Live. I can think of a shitload of senario's where this would come in handy. For instance, lets say your in the strip club and your best friend cant make it cuz his wife wont let him go. Well you simply open the app, select your friend from the list and knock him. If he answers the knock he will be greeted to whatever your iPhone video camera is capturing. Hopefully female strippers. No sheep Stinker. Basically, he can watch live whatever your capturing on video.