The action was slow early. Henderson swung away with the big right hand but missed badly. His corner apparently told him Shogun's left hand was dropping, leaving him open for the "H-Bomb".
It wasn't landing early.
In fact, Shogun was dictating the pace, pressing forward and firing off jabs and kicks to keep "Hendo" back.
Then, it happened.
Henderson did, in fact, land the big right hand and Shogun went down in a heap. It took follow up shots to end it, but the right call was made.