User blog comment:JAlbor/Wikia at E3 2012/@comment-5088097-20120602005518/@comment-4868246-20120615221610

Actually, one of the Frontier gameplay demos had Connor accidentally unsheath both hidden blades, I don't know which video it was because there are multiple versions of the Frontier gameplay but one of them showed Connor releasing the 2 hidden blades while approaching the dead deer :D