A child returned from his first music lesson on the tuba. "How did it go?" asked his father. "Great," said the child. "I learned how to play a 'C'." The next week the child took another lesson and his father asked about the lesson. "Terrific," said the child. "I learned how to play a 'G'." The following week the child did not come home. The father was frantic when the child finally came home after 2:00 AM. "Where in the hell have you been!" screamed the father. "I had a gig," answered the son.