In the chapter Highway 17, just after defeating the gunship on the bridge and the zombies in the tunnel, you will come across a small village with a lighthouse. To get there, just drive on the road after exiting the tunnel.

The insane man will tell you to park in the garage. Nod your head and say "No!" as you proceed to piss him off.

Notice the useless junk around you.


Next, park your car half way in the garage. Leave the rear wheels out of the garage.


After you do that, the pissed off man will continue telling you to put your car in the garage after you already did. Ignore him and pull out the Gravity Gun.

Use the gravity gun to move the useless junk around you under the opening in the garage, next to the car. I recommend you stack two pieces of junk so the pissed off man can't lock your car in the garage.


Once you have managed to get the junk pile set up, get in your car. SLOWLY inch forward until he says something other than "Put your car in the garage."


When he shuts up, you can back out of the garage. The junk pile will collide with your car. If you get stuck, use the turbo to get out.

After you have successfully gotten your car out, you can run over combine as much as you want.