The Bros at Gizmodo discovered an excellent prank that will cause your friends with iPhones to bug the f- out. You know those blinking dots that indicate someone's typing while texting on an iPhone? There's a great way to really freak that person out. It will drive them batshit crazy in anticipation of your text, which will never really come... Because the dots are only in iOS7, it goes without saying that it will only work on iOS7 users. Also, probably works best to already be mid-text convo with them as well.
All the credit here goes to Miscellaneous Mischief.
Drive your friends crazy.
1. Save this image to your phone.
2. Text it to anyone with an iPhone.
3. Laugh. Then do it to someone else.