One moment, John had been just walking out of the kitchen, and the next moment, John was right here, just centimeters away, pulling his hands back to his sides. He looked around, and his pulse jumped, his eyes going wide.

Sherlock was sitting where he had just been, but he wasn't moving a muscle, wasn't blinking, wasn't even breathing!
He stumbled back a step, his coppers' instincts coming to bear. He sure wished that he had a gun right about now. He didn't think he;d need,it going to 221B Baker Street.

Now, he wasn't so sure.

Greg looked around, panicking, trying to keep his wits about him. "Wha' the hell is goin' on here?" He yelled, looking back to John, who seemed to be taking this all quite calmly.