In the Buffy episode "[Once More, With Feeling][1]", how did the Scoobies "beat the bad guy", as Sweet the demon puts it? Or did he just get bored when he didn't succeed in making Buffy burst into flames?

  [1]: http://en.wikipedia.org/wiki/Once_More,_with_Feeling_%28Buffy_the_Vampire_Slayer%29