Nifty, but I found the navigation to be a little odd at first. I didn't immediately realise the bottom row is always the OP, and so tried to hit my back button

Nifty, but I found the navigation to be a little odd at first. I didn't immediately realise the bottom row is always the OP, and so tried to hit my back button to travel back 'up' from a thread but because it does not load a new page I couldn't. It makes sense now that I figured it out (the bottom n rows keep expanding to be the full width, meaning you can always breadcrumb back) but that wasn't immediately obvious to me. This is a cool idea though and definitely allows me to see the 'controversial' threads because they're usually the biggest flames :) Does this order left-to-right based on the upvotes that HN itself uses for ordering?