Thanks for the kind words! That screenshot looks like the tail-end of the road - the world despawns behind you as you drive, leaving behind this weird-looking trench. That isn't a bug, but it definitely looks like one - the plan is to add a little achievement for driving back that far, so that people will know it's expected behaviour. Don't worry about replicating bugs, or finding exact coordinates; I've been seeing them all stream in on my analytics backend, and they come with all the metadata I need :)