1. Put pixel on a flat surface. 2. Half an hour later, discover that the the surface wasn't actually flat, as phone the phone crashes to the ground, having been slowly inching its way off the 'flat' surface by virtue of the magically friction free back case of the phone...
No joke, by far the slipperyest phone I have ever had, and the one I slapped a case on the fastest, but not fast enough to avoid many dents.