I saw your same question in other thread, but....
It's hard to tell without seeing a scene (or at least preview, and screenshot of the flow).
First of all, have you played with mass in PhysX? You should try some extreme numbers, like 100 mass for the balls shooting (and the car itself), and 0,1 mass for the brick wall.
Also, if it is all happening very fast, you might want to consider changing step to 1/2 or 1/4 in Tyflow icon.
Btw, you don't need PhysX shape in next events, it goes automatically in next event, unless you add PhysX switch in next event and set it to deactivate.
Same goes for shape operator.
It's hard to tell without seeing a scene (or at least preview, and screenshot of the flow).
First of all, have you played with mass in PhysX? You should try some extreme numbers, like 100 mass for the balls shooting (and the car itself), and 0,1 mass for the brick wall.
Also, if it is all happening very fast, you might want to consider changing step to 1/2 or 1/4 in Tyflow icon.
Btw, you don't need PhysX shape in next events, it goes automatically in next event, unless you add PhysX switch in next event and set it to deactivate.
Same goes for shape operator.