iPhone blue screen of death?

I got a new iPhone 5S, and got it all setup.  It had to run overnight to download the mass of photos.

In the morning I tried to have it upgrade to the 7.0.1 update.  In the middle, the screen flashed blue (in I'm assuming a nod to Microsoft) and went into Restore mode.

I had to plug into the computer with iTunes and setup everything again.  Weird.  Hopefully it doesn't happen again, I'll have to remember to only apply updates at home.