DUH! News of the Day: iPhone breaks when dropped
 

We have a full iPhone 4(minus the circuit board), here at our shop and decided to do a little drop test. This drop was performed from 3.5 ft up. Mind you that these parts ARE original apple parts. Laser etched and all. The iPhone 4 did survive 2 drops, as expected, but on the 3rd drop there was a loud POP, and yet again, shattered glass.

http://www.ifixyouri.com/blog/?p=59