Try as they might, stairs cannot kill the Lumia 920.
I dropped my phone as I was going home for the day. I pulled it out of my pocket as I was coming down the stairs and it slipped out of my hand. It fell down about 10 steel lined stairs before smacking down glass first on the concrete bottom and sliding a few feet. I was honestly expecting much worse...
So as you can tell, the screen still turns on and the touch sensors work perfectly fine. Even the Bing Search button, which was completely shattered, works perfectly as you can see in the picture above. I was kind of surprised. Also, if you look closely, you can see where some of the glass fell out and is exposing some of the internals. Fun stuff!
The shell didn't take much damage at all. I too some pictures of it, but you couldn't really tell where the scuffs were. Here's my temporary solution for not getting glass shards all over my hands and pocket:
It was a noble effort, stairs, but you have not won this time.
Also, I'd like to make a shout out to the very terrible Lumia 900 camera I used to take these pictures. It's all I had near me.