Custom ASIC Mining at it's best :P
http://kotaku.com/bitcoin-mining-is-getting-out-of-control-1471769898?utm_campaign=Socialflow_Kotaku_Facebook&utm_source=Kotaku_Facebook&utm_medium=Socialflow
This kind of stuff is bad for bitcoin, actually. The closer any one group gets to 30%, the close we get to someone doing 51% attacks against the network, and trying to undo past and future transactions in the network.
Hopefully the growing pains will iron themselves out, but for now we can only sit back, and wait.