That just indicates that a single person (or a few people) put in a big buy order. I would have too if I had the money. The bids take time to catch up, or it bounces back down a little. It isn't necessarily manipulation. But it could be. Most likely, someone just anticipated a rally and decided to go all in on it, fueling it in the beginning. That isn't really manipulation in my book, just a gamble. If the rally doesn't catch on, he loses money, if it does catch, he got a bunch of bitcoins at a good price.

I have no idea what it'll do after the pause.