The Tale Of Timothy Turtle in "Turning Turtle"

Old Mr. Crow coughed—and winked at his friends. "The trouble was"—he explained—"the trouble was, you lost your balance and landed in the creek upside down. And of course you couldn't fly in that position. It's what's called 'turning turtle,'" he added, "and I might have known—if I had stopped to think—that you'd be sure to do it."

"Well," said Timothy Turtle, drawing a long breath, "I'll tell you right now that I'll never, never, turn turtle again."