A junior high music teacher had just organized a band in her school. The principal was so proud of the music teacher's efforts that without consulting her he decided that the band should give a concert for the entire school. The music teacher wasn't so sure her young musicians were ready to give a concert, so she tried to talk the principal out of holding the concert, to no avail. Just before the concert was ready to begin, as the music teacher stood on the podium, she leaned forward and whispered to her nervous musicians, "If you're not sure of your part, just pretend to play." And with that, she stepped back, lifted her baton and with a great flourish brought it down. Lo and behold, nothing happened! T…