Anyone else have theirs freezing occasionally?

From your screen shot it looks like you had some apps update & box running. Depending on the number of apps updating at once and the whether it was on wifi or network it could have caused the spike.
 
Interesting, I hadn't even noticed the hiccup at the end of the day. I wasn't using the phone when that happened. What I was writing about occurred above the 0 in the 10h in the first screenshot.