During the Challenge of Atlas after you cross the bridge and pass the saw room, there will be an enemy at the bottom of the tower. Don't kill him, just go to the ladder near the wall. Position yourself so that you are between the enemy and the ladder. Use the square, square, triangle combo to take him out. Make sure you kill the enemy above the ladder. Once you kill it, it should hit the ground, then bounce back up getting caught in this bounce. If done correctly, it will continually release red orbs. Once you get the glitch going, just stand there for about 10 minutes. You will get the max amount of orbs, 199 full red bars which is 59,700 orbs.