Assault Rifle floating

From Traxus

To accomplish Assault Rifle Floating, one must have a fully-loaded assault rifle and a wall. First, get right next to the wall, face it, aim the weapon down, and take a deep breath. Then, begin moving backwards and nearly immediately fire both the secondary and primary modes. Continue facing away from the direction you want to travel in (Marathon will follow wherever your back is due to its momentum system), continue to point down, and continue to fire both modes at the same time.

Once your assault rifle clip is expended, you will begin falling. While it is possible to recover from this, it is difficult and generally easier to find a nearby ledge and begin again.

See also: Grenade hopping, Rocket hopping