sentence: A black man leads  class of people dancing for exercise in a parking lot. sentence:  The man moves slow to show the move. sentence:  The man then goes fast and the class follows his lead. sentence:  The camera pans and we see the class as a lady in black pants joins. sentence:  We see the class and the teacher as they perform the routine. sentence:  We see the teach and the class as they move their arms. sentence:  The routine finishes and the class claps for the teacher.