Swan dive?

I was on the computer and Rhylan was playing on my bed, when I looked over at her... she walked right to the edge of the bed and put her arms out to the side. I about jumped for her, I thought she was going to do a swan dive off the end of the bed. Luckily she didn't because I don't think could have moved across the room that fast! Here is a video of what she did do--(again)