So how do you do it? You import some snapshots in the movie and use them as guidelines?
No, Max (aswel as other packages) has built in Physical Simulation System. You can collide objects, explode stuff, roll, bounce, rip, etc... as shown those 2 cars were done with similar Physical engine.. allltho roughly since you can see is not perfected at all.
So i collided them on a simple plane surface... made that surface matt.. (transparent with shadows).
Found an image, created camera to match the view.
Added lighting to match that image.
Rendered transparent frame sequence.
Improved image in photoshop by cutting out foregroudn obejcts in order to bring them to front.
Added footage in Premiere on top of static image layer and below the foreground object layer.
Few color adjustments, simple sound effects... done in 2 hours.