"In an early version of the script, Buffy's 'defeat' of Dracula is less comic and more nonexistent. In the script his exit comes after she arms herself with a lit torch taken off Drac's wall whjen Giles and Riley burst into the room:
The arrival of her entourage is the final draw for Dracula. He fixes Buffy with a final look, full of both pain and fury.
DRACULA: 'What a shame. You could have been great, you know.'
With that, he flings himself out the massive window, shattering it.
EXT. DRACULA'S CASTLE-NIGHT.
Dracula, having changed into a wolf, comes flying out the window. He hits the ground and lopes into the dark woods."
The aired version: Click
Source (as usual for Buffy-excerpts): The watcher's guide.