One day at the office, Michael ran into Dick by the water cooler. Normally Dick who is young, single is energetic all day, but that day he looked beat.”Hey Dick! How’s it going?” asked Michael.”I’m not feeling too good today. In fact, I’m utterly exhausted,” answered Dick.”I pulled a muscle, and it’s killing me.””What’s a pulled muscle got to do with you feel so tired?” Michael asked.”A pulled muscle doesn’t make you tired!”Dick yawned and said, “It sure does if you pull it five hundred times in one night!”