The Magic Shop - H. G Wells
What does "If the counter wouldn't suddenly extens itself to shut one off from the door" mean here?
"So should I," I said to myself, "if the counter wouldn't suddenly extend itself to shut one off from the door." But I didn't call Gip's attention to that. "Pussy!" he said, with a hand out to the rabbit as it came lolloping past us; "Pussy, do Gip a magic!" and his eyes followed it as it squeezed through a door I had certainly not remarked a moment before. Then this door opened wider, and the man with one ear larger than the other appeared again. He was smiling still, but his eye met mine with something between amusement and defiance. "You'd like to see our showroom, sir," he said, with an innocent suavity. Gip tugged my finger forward. I glanced at the counter and met the shopman's eye again. I was beginning to think the magic just a little too genuine. "We haven't very much time," I said. But somehow we were inside the showroom before I could finish that.