Jake already made one out of the Zeta in RoR. So, yes this will definitely be possible, as it's simply physics and BeamNG runs on simply physics... High center of gravity(the Golf in the video is sat on a Golf Country chassis), lots of momentum(slam the brakes on at speed), light rear end(no interior). Should be fun to make this and the Sas Wipkar(Redneck rollercoaster car) Btw, that thing used to be called the Midget/Mini-golf, before they added the bars, then they thought Golfball, and then they thought Rollcountry or Minicountry, but decided on Rollgolf ... Wordplays everywhere!... I've seen it in action when I was at their place, really cool. Driven the Wipkar/rollercoaster car myself too, but I wasn't very good with the automatic gearbox it has. Really awesome though!
Here is the zeta mod for RoR that Off-roader and my self made. http://www.rigsofrods.com/threads/104636-Zeta-Roly-Poly-Teaser-Both-Videos-Done!