Pacific Harbor:
To stop truck on bridge, you will need to drive to the opposite 
end of the bridge that you start out facing. Once you get to the 
other end of the bridge turn your car around and center yourself 
on it and wait. After about a minute or so a cargo truck will drive 
across the bridge and ram into the back of your car. Try to keep your 
car straight so you don’t go flying off of the bridge. Each time the 
truck rams you it will slow down until it eventually comes to a complete stop. 
Submitted by unknown