Hmm... so how about teaching some of us how to script a car in cs2d with boundary boxes and such, I mean when the car collides with player at a rather high speed the player dies and if it's a low speed of the vehicle then it simply blocks player from going through the car. I know this is possible in Lua, no one has yet done it I guess. This would be a rather great tutorial on knowing how to create a car using Lua scripting. Otherwise we go by the examples that GrandMyth decides, but I was just suggesting this.