The car hit a tree heavily bottom first, the impact point being directly underneath the driver's seat. This impact with the tree stopped the car's forward momentum in an instant, and then threw it down and slightly back towards the direction it had come from. This is why the car is travelling from right to left as it appears into view in the video, as it has already received the fateful impact with the tree.how could the S4 appear to exit the road, I'm talking about the "falling" moment, from right to the left?
It's important to remember that the car was in mid-air when it hit the tree. Here's a heavy crash from a Finnish rally that has somewhat similar accident dynamics when it comes to a heavy tree impact in mid-air and then car falling down after that. The difference here is that the car hits a tree nose first, and not bottom first. But just like in Toivonen's case, the tree stops the car's forward momentum in an instant and then throws it down and slightly back towards the direction it had come from.