Parsva Bakasana or Side Crow or Crane. Yes, technically both hands are on the floor...up above I'm doing what's called "funky Side Crow" w/ a forearm variation. Here's on two hands...I love this picture from Cinthia Torres. She takes some amazing yoga photos.
The key is sending your weight FORWARD. You must tip so far forward that you are pretty much certain that your face is going to smash into the floor. But don't worry, that's what a yoga blanket crash pad is for! Also, do not look down when attempting this pose, but look forward. As shown above. Looking down and inward makes it just that much more challenging. Send your weight forward, look forward.