Sherlock’s face. It’s saying “Oooooooooooppppppppppsssssssssss.”
And look at Sherlock’s face in the first gif, and then the last. He’s desperate for John to say that he loves him. Then...
sherlock’s face though.
That heart-wrenching moment where Sherlock realizes what he just said - UGH Benedict your acting is FLAWLESS.