However, the nature of the parachute's turning system makes it possible for the player to actually achieve vertical lift, suspending their glide for an indefinite amount of time.
This glitch can be exploited from any height, as long as the player has the parachute active.
Pull back with the left thumbstick, putting the player in the 'slow fall' position, then, rhythmically press the left and right triggers together. At a certain rate, the player begins to stop falling and start going up.
With sufficient altitude, it's possible to reach incredible heights, even leaving the game's skybox.