I dropped the phone from the side of the bath (44cm / knee height) onto the face and it shattered a few weeks after I got it. Yes - I measured and I couldn't believe it!
I was pissed off as I chose it over the Samsung S5 at the time, with the main thing swaying me being the perceived strength and fact I wouldn't have needed the free screen replacements that Samsung gave me. When I got the quote for the screen (R4,500 or so) I was even more pissed off and wrote in to tell them how unhappy I was.
They understood ... then gave me a brand new phone. The back of that phone cracked a few weeks after I got it (spontaneous cracking issue), but that didn't bother me.
Anyway, I've always been very scared of even putting the phone down too hard on a table since. I'm not sure it was a flaw or once off, but I'm not testing it