Found in comments here:
Stashed in: gifs, Split Depth gifs
I'm not sure who made this gif but it's a good illustration of the 3D effect of split depth.
Guy Builds Solar-Powered Death Ray In His Backyard (Yawn) : Krulwich Wonders... : NPR
If you get hit, it's your own fault.
Why I am leaving the best job I ever had, by Max Schireson, CEO of MongoDB
Adam Grant TED Talk: The surprising habits of original thinkers