You begin staring down a hallway that has a few steps down into it. Don't go in that, though, turn completely around and move up the three steps behind you. Now, I hope you aren't tuckered out after all of that exercise, because you're going to turn back around the way that you came, and move to the open door on the left. Just through that open archway, in front of the two yoga mats. That's it, you're done.