Willy Wonka: "Faster, faster! If we don't pick up enough speed, we'll never get through."
Charlie: "Get through what?"
Willy Wonka: "Ah. (He points up)"
Grandpa Joe: "You mean, we're going--? (He points up)"
Willy Wonka: "Up and out."
Grandpa Joe: "But this roof is made of grass. It'll shatter in a thousand pieces! We'll be cut to ribbons!"
Willy Wonka: "Probably."