Revealing mistake: In the scene where Joey parks his car behind Kat's you hear him coming up really fast and then you see it stop, but if you look in the window across the street you can see in the reflection that the car was still and then it just moves up a little bit. (00:25:30)
Revealing mistake: In the scene where Michael is speaking to Cameron after being insulted by Kat, he drives over the edge of the pavement on his bike. If you look carefully at the pavement as he drives over the edge, you are able to see a ramp that is aiding him in driving over. (00:11:55)
Revealing mistake: The Pedalo is not moving forward, even though Kat and Patrick are cycling away. Also, the two people are supposed to cycle at the same rate - Kat and Patrick are not. (01:07:35)
Revealing mistake: When the totally drunk Kat and Patrick are outside the party on the swings, Kat throws up. The characteristic sound of vomit hitting the ground can be heard but it's pretty obvious even though her hair hides part of it that nothing comes out of her mouth.
Answer: A 1964 Dodge Dart.
FordGuy