First kill the people by the crates. Then stay at the crates.

Then go to the end of the crates. You will see a blown up yellow car.

Jump on the hood of the car. Then turn right jump on the blown up black car.

Then jump onto the red crate. Then jump into the bushes and you will end up on the first mod 2s map.

Do not jump in the giant black square when you're wandering around!