Choose 'Select Team' and pick the opposite team. When in a multi-player game, go to a any MG42 and use the gun. To ensure that you fly up, go to a cliff and go off it. Note: Sometimes you must keep trying because you may get stuck, cannot move, or cannot escape from where you are. To remain where you currently are (leveled), enable the ' set sv_gravity 0' code. To get back down, enable the ' set sv_gravity ' code with a positive number. To go off the ground, enable the ' set sv_gravity ' code to a negative value. From there, move towards the white spots and enable the ' sv_walkspeed 500' code. Start walking and at some point you will begin flying above everything.
Enable the ' set sv_gravity ' code to a negative value in any level.