There's this DS game called COP the recruit it's basically a fully 3d gta game but it's pretty boring, since they probably didin't wanted to get the M rating, it's one of those games where every passerby is secretly a Superman that jumps out of the car's way and you can't shoot anyone normally, only in scripted events you get to shoot but it's pretty clunky, also you can't really do anything when you are on foot.
You can take anyone's car tho, and whover was driving it ceases to exist.
Driving cars is the best part of the game probably and it is also the subject of this glitch...
The glitch let's you go out of bounds pretty much where you want, so here's the explanation:
So if you take a car and use it to push Another one into the wall it gets destroyed on the spot (i wonder why) BUT if you take yet Another car and use it so that the second car pushes the first one into the wall you can get it thru after that you can enter it and exit on the other side! The downside is that you have to go on foot because the car almost always gets stuck in the wall (if you push it to much you can't enter it) i think i did once with the car tho.
There's not much intresting out there and after certain point there's Another invicible wall, you can probably pass thru it with the same method but i imagine that getting 3 cars properly out of bounds would be a pain.
It's nice seeing the map freak out sometimes tho.