Why did the kid throw the clock out the window?

Behind the Groan

When Time Really Flies

“Time flies” is a familiar expression meaning that time seems to pass quickly. The setup turns it into a literal picture by putting a clock—the object that displays time—through the air. Ask the question like a simple riddle, then pause before “time fly.” Keep the answer calm rather than acting out the throw; listeners need only connect the moving clock with the everyday expression.