Noooooo.
What we mean is, if you shoot it and miss the vehicle you were aiming for, does it turn around and come back?
Well, if you have enough room for manouvering, yes.
The rocket will try to reach everything you aim for.
Vehicles, bricks, players, terrain, everything.
If you miss something, simply aim at it again and make sure it has enough space to turn around (collision with walls results in a boom too!) and you're ready for round 2.
Keep in mind that looking straight forward in an empty slate map will result in odd behavior.
Raycasts are (as far as i know) the best way to do this.
Correct me if i am wrong, togheter with proof if so.