Bailey used to do this a lot, and when she REALLY wants to play, she still will! Not a big problem for us because it's only occasional, but I know those puppy teath KILL your ankle. I would stop and say NO! In a stern voice. Sometimes Bailey has those nights were she is really really tired but is too lazy to go to her bed, so she will just walk around next to me in the kitchen. But she is half a sleep standing up and she doesn't move when we walk, and we bump into her... she gets kinda startled.It's cute... I know that story didn't really relate, but bumping. I thought it was cute