Well... good luck breaking your phone. I left mine on the hood of my truck once and then got a call from the Dept. of Transportation... they found my phone in the middle of the Highway... and I didn't have a PIN on it... so they tracked me down... HAHA.
So, get this, the phone still worked even though there were chunks of glass missing off the screen. I could actually still use it, and I kind of enjoyed showing it off while I still had it. Also to note... I had the GPS tracking running unintentionally when this happened. So when I looked at the GPS track the phone had recorded after the phone was returned... I could see on the map how it was being run over and sent in random directions all over the Highway.
And yet, the phone still worked for quite a while. it was in a rugged hard-case... that helped. but still. left on the top of a truck, slid off of truck going at approx 55 mph, landed in the road, and was run over multiple times by multiple vehicles also traveling at approx 55 mph...
and it still worked....