This photo shows you all of the crushed car models that comes with the set - five single cars, a stack of two cars and two stacks of four cars.
These were incredibly easy to make, as they are all simple box shapes. However, I did add a special Vampifan wrinkle to make them look more realistic. Before I stuck the printouts to the mounting card that reinforces each model I scrunched up the photo paper printout and then smoothed it flat with my hand. Obviously, I couldn't smooth them perfectly flat and nor did I want to. When I stuck the printout to the mounting card I was left with uneven surfaces. Once the cars have been through the car crusher they are not going to come out perfectly smooth. There will be dents and wrinkles in the bodywork. This was my simple method of replicating that effect. Believe me, it works well.
By the way, the Mayhem Junkyard set does include a car crusher, but I haven't made it yet. Don't worry, it will get made soon as i have already printed it out.