Shake the phone and hear him screaming ! Several screams for several kind of shaking.Funny joke! crazy screamer !Funny shake alarm if someone unahutorized picks your phone or just a funny app to joke with friends.Does not drain battery when not used, just keep it running till you want to use it.Sounds are professionally processed digitally to make the application effect EXTREMELY funny.Try out the LOL SHAKE app too and make it laugh..This program is provided "as is" without any warranty as software general EULA. Have fun and enjoy!