Go to your gas station safe house. Find the trolley tracks (not the train tracks) in the middle of the road in front of the safe house. Enable the "Spawn Jetpack" code and wait for the trolley to pass by. Once it does, fly into the air and land on top of it. Then, press Y to take off your Jetpack. Enable any "Weapons" code and start killing pedestrians. Once the cops start chasing you, you will notice that when they try to ram you, the trolley will not get damaged, and is actually invincible. You will be able to drive through the town and use it like a giant shooting gallery. There is no need to worry if the military starts chasing you. The trolley car can ram right through the tanks, sometimes flipping them over. If your health gets low (you can still be shot by pedestrian cops), enable the "Health, armor, and money" code. This trick allows you to live a surprisingly long time while being hunted down by the feds. To enhance your experience, you can also enable the "Pedestrians riot", "Pedestrians with guns", "Aggressive traffic" and "Lower wanted level" codes, then relax and watch the havoc unfold around you all from the safety and comfort of a big red trolley car.
