I left my beloved Palm Zire72 in my backpack... right next to a mechanical pencil with a very sharp tip... When i took it out the back had the heck scratched out of it. I got lucky I guess since it was the back and not the digitizer.

I've also dropped my N810 on my driveway and taken my phone to the beach only to have to completely dismantle it and clean the whole thing out with a q-tip :P