Well, shit happens:
It's been blogged to death of course. Source
Remember the Wii problems shortly after it was introduced? Wiimotes crashing into walls, TV sets, people, because it was slippery and people get a bit too enthousiastic.
Well, iFun (iGolf, iBowl, iBaseball) has introduced the same concept but for iPhone (and iPod touch?) users. Move your iPhone around to tee off for instance.
The iPhone itself is already pretty slippery (I have a silicone skin on it to make it easier to hold), but when you start thrashing around with it, I bet there'll be accidents.
Don't say I didn't warn you eh ;-)