Somebody placed a nicehash order on Cryptoknight pool of a ridiculous hashrate. Difficulty is now balanced, network rate should eventually update. But about the high difficulty, spamming a pool w > 15mh hashrate with a 10mh previous hashrate is really stupid, I'd guess that you'd actually earn more with less.

Can't say how long this order will persist but I think that person will either realize he's throwing away money or just run out of money. It's been like this for an hour hoping it'll restore soon!