The incident occured on a highway whereas speed limit is 55mph and 18wheeler was right ahead of your car.

When 'object' or 'pipe' fell on front of your car, you must have hit the brake or took precautions to slow down the car.

At that moment, 18wheeler must have gone way ahead of you.  So who signaled the 18wheeler driver  to stop?

If he stopped himself, that means he knew something had happend. Otherwise,  you have to show the broken piece of object missing

on 18wheeler or you need to run back to the highway to find that object to make sure it fell from his truck.


Since you didn't tell us in which States this accident happend, I'd assume it happend in Mars.

Btw, $1000 deduct....so nepali brain!!!!!