Call of duty 4 Bounce on the map Pipeline Call of duty 4 maps were designed very simply but to the experienced player are more complex  than you think. The experienced player can move around the map with great efficiency. In the picture to the right you can see a player aiming his gun at the top of a truck. Due to the angle of the surface if a player jumps onto it they will bounce upwards off it. By changing their FPS they can get even higher off the bounce and land on the building in front. This is just one example of many bounces that you can hit on one of many maps. There is so many different angled surfaces on all the maps in the game that new bounces can still be found to this day.