There is a glitch at Seelow heights. There is a stairway that leads to the upper floor. At the top of the stairs move right and you will find yourself in the floor. Do not move to far right or you will fall down. Move forward slowly and you will pass through the wall. There is also another glitch. Go toward the tank on the north side of the course. You will be able to climb onto it and then go straight. This glitch takes a lot of practice so do it slowly. Keep moving forward and you will find yourself outside of the course.
On the course the jungle, there is a tank. To the left of the tank there is a large rock. Run straight up the rock and you will be actually into the mountain. From there you can snipe anyone on the whole course.