The iPhone as a vibrator. It could happen. Scott Adams saw it coming (pun intended) long ago.
Quote:
Dilbert: On weekends I'll feel my pager vibrate...but when I go to check it, I realize I'm not wearing it.
Shrink: It's a classic case of phantom pager syndrome. It's common among technology workers. There's no treatment for it.
Dilbert: I don't want to treat it. I want to relocate it.
http://search.dilbert.com/comic/Phantom