Giles:  A slayer should be able to see them anyway . Without looking , without thinking . Can you tell me if there 's a vampire in this building ?
Buffy: Maybe .
Giles: You should know . Even through this mass and this ... din , you should be able to sense them . Well , try . Reach out with your mind . You have to hone your senses . Focus till the energy washes over you . Till you - you feel every particle of - of ...
Buffy: There 's _ one _ .
Giles: W - Where ?
Buffy: Right there , talking to that girl .
Giles: You do n't know ...
Buffy: Oh , please ! Look at his jacket . He 's got the sleeves rolled up . And the shirt - Deal with that outfit for a moment .
Giles: It 's dated .
Buffy: It 's carbon - dated . Trust me , only someone living underground for ten years would think * that * was still the look .