There I am, rinsing off, eyes closed and all, and a feel a hand grab my butt! I freak out, scream like a little girl and dart forward. My right foot flies in the air, and in a moment of complete awesome ninja-ness I somehow find my grip and balance on my left foot. She then proceeds to fall to the ground laughing hysterically.
It seems I will have to watch my backside more carefully in the coming days...