 According to Giles, blinding enemies is a favorite trick amongst witches.Amy Madison (Elizabeth Anne Allen), another contender, seems to be under intense pressure to compete from her domineering mother (Robin Riker), a star cheerleader in her day, and is crushed when she only makes the substitute list after Cordelia Chase (Charisma Carpenter) and Buffy.Believing Amy to be a witch, Buffy, Xander (Nicholas Brendon) and Willow (Alyson Hannigan) collect some of Amy's hair during science class, to prove that she cast the spells.