BlkBear

Even Gorilla glass will break on the the first drop, especially if it's a edge hit. That's the problem with all tempered glass, including gorilla glass. It can stand up to the shock of a strike or a drop if it does not make contact with the striking surface. But let it take an edge blow or a stress/flex to the hit, and you normally get spider glass, instead of gorilla glass.

The good thing is most of the time you get lucky and nothing happens, but shock can still zap the LCD (or other display type) screens being covered by temper glass. This is because the display screen glass (if it is glass) is much thinner and does not flex or handle stress and impact shock as well and the protective glass that you touch, does.

And pocket sitting puts a lot of stress and flex on the case and everything inside the case, before you feel the phone and jump up to remove it from your pocket.