 In Season 6 there is a scene where Buffy is playing Charades with  the crowd at Xander and Anyas wedding. She puts her fingers up to  her head like horns and you can hear someone in the background guess  "Deathwok Clan!". This is a reference to Lorne from  _"Angel" (1999)_ (qv), who is a demon with horns and a member of the  Dethwok clan.