Warning! If you have a fear of heights, this video is not for you. Twenty-five stories above the streets of New York City, Rachele Brooke Smith is getting her sky-high yoga on. She even smiles and says, "That's not scary at all." I hope she's joking. Who needs a yoga mat when you can do Dancer on a ledge that's half as wide? Just don't forget to use your drishti — a steady gaze could mean the difference between nailing a pose or falling to your death!