Buffy and Spike meet Edward and Bella:
Buffy: OMMFGWTMFF! A vampire! I must stake his ass!
Edward: No! Not the hair!
Buffy and Edward fight whilst the following takes place.
Spike: Ooh! A human. Yummy.
Bella: ummm… Edward?
Buffy: (stakes Edward)
Edward: (poofs into a cloud of dust)
Spike: om nom nom.
Bella: (dies, because Spike just went on nom nom on her blooooooood)
Spike: LOFL!