Unless he found a new place for that bug, that bug is achieved by reversing towards a fence gate located at the end of the straight, before the corner. Only works with FWD -FWD because its the only one that can drive out of it when doing that bug- and small cars (Screenshot attached)
it happens on that bug with any car. That thing happens on layout objects called concrete slabs with on similar method. I think that is possible to happen because only wheels are modeled and not whole axle or body from underneath of car, or something like that. Anyway, the vehicle will act like the motorbike in famous game called ElastoMania. As in there, only wheels are modeled to have on contact path and helmet has hitbox.
Also, if dropping from high place, you will be forced to drop like that with all four wheels or completely through.
A bit off topic, but it isn't THAT new though. This was also possible to do on Skid Pad in previous patches, similarly like mentioned in topic, though it was a bit harder due the contact paths. Car rather managed do a backflip than grinding on the tarmac.