 On a routine nighttime graveyard patrol , Buffy laments in song about how uninspired her life has become ( " Going Through the Motions " ) . The next morning at the Magic Box , Buffy 's friends reveal that they also sang that evening . Led by Giles , the gang theorizes about the cause of the singing , sensing no immediate danger but agreeing that by working together they can overcome anything ( " I 've Got a Theory / Bunnies / If We 're Together " ) . Buffy learns that the whole town is affected when she looks outside the shop to see a large group ( led by series writer and producer David Fury ) singing and dancing about how a dry @-@ cleaning service got their stains out ( " The Mustard " ) . 
