Rorro

I know that theres a lot of Buffy fans so I want to ask you something...
Maybe this is old but i saw this episode of Buffy the other day.. and i didnt watch it from the beggining but the episode was about Buffy on a sanatory center and she was crazy!!.. and all the vampire slayer thing was alucinations!!.. but there was a confussion cause you never know what thing is an alucination... buffy on the sanatory or buffy the vampire slayer... please explain me this episode.. is she really crazy and the vampire thing is an alucination (it seem like it because of the end of the episode).. please help.. thankss

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