A guy watches two men working in a park.

The first digs a hole, and the second one comes along and fills it in. They walk to a new spot, the first digs another hole, and the second guy fills it in. After the 4th time, the guy goes up to the workmen and says, What are you doing?” The first man says, “There’s usually 3 of us, but the guy who puts the tree in the hole called in sick this morning.”