ya it definately looks like "that green stuff", aka, astroturf. I got a sheet of it for my summer set up and i have to soap it up and put water on it. It works alright though, we didnt have an inrun though so it was kinda difficult.
I have both, my place is loaded with hills and we have all kinds of shit for tow ins. If we cant ski on a snow day, we build a booter not a rail. I have a pic of where i put my BMX stuff and some little ski stuff in the winter I'll work on getting that up here.