Spoilers ahead? So in the black garden there is a section where you have to defeat enemies powering a door, if you try to approach the door before it is open it gently pushes you away. However In the area just before the door, you can hop around the outside of the map to reach the opposite side of the door without opening it. Now, this isn't a useful cheat since you still need to kill those enemies in order to get the next mission objective, but it does have a rather funny side effect. Once I realized I still needed to kill those enemies I assumed I would have to go to orbit, but tried walking through the door from the wrong side anyway, just in case I could save myself the redo of the mission. Well it worked, and sent me flying at high speeds to the wall opposite and my bloody death. I'm not claiming this is some amazing find but if you're running the mission with a buddy anyway it's fun to do, and even funnier to watch someone else do. Just make sure you don't kill the hydra, that will open the door. Enjoy.