Fallen Rocks watch

Santa is driving down a road and sees a sign that says, “Watch for Fallen Rocks.”

A few kilometres later, he sees some rocks at the side of the road, so he stops and picks them up.

When he gets to the next town, he carries the rocks into the HighwayMaintenance office and puts them on the counter.

“Here are your fallen rocks,” he says to the man behind the counter. “Now where is my watch?”.