Invisible bridge glitch
From Halopedia, the Halo wiki
The Invisible Bridge Glitch can be found on the level, Delta Halo. Once you begin, jump on the hill with the Grunt on the turret, jump up and up till your ontop of the map then go to the bridge area (If there are enemies around and Regret hologram is on the hologram, you messed up). Walk on the area the bridge would be (if it's there, go inside and unextend). Walk into the void where the bridge would be.
