Hall of Mirrors

Mirror, Mirror on the Wall.

This glitch can be done on the second part of The Covenant(Level) and on Sandtrap. For the Sandtrap part, this must be done in Forge mode. Go into Forge mode, go into that casam type thing and face the high dunes that cover up the barrier. Look left and move forward into the indention of top of the wall just below the ledge and zoom in. You will either see a reflection of yourself or what your opponent(s) are doing. For the Covenant, skip to Rally Point Alpha. Get into a Hornet and fly to the second tower. Look directly at it and hover down to the left. You will be facing a ledge, go there. Park the Hornet onto the longest ledge and face the rock wall. Turn left and move forward to a crack in the rock. When you look in it, you will see yourself or whatever you're co-op partner is doing. These are the only two places so far that I have found this glitch, so look for anything under this description.