Could somebody please explain because this has been driving me crazy!
And before I begin, please don't tell me "It's only a movie," because Joss Whedon wrote this and I'm pretty sure he wouldn't be dumb enough to overlook this detail.
One thing about BUFFY that doesn't make a lot of sense to me is that the title character turns herself into basically a champion kickboxer after only - judging by the implied time frame of the movie - three months at the most. Prior to that, she, by her own admission, had had no combat experience.
I remember reading somewhere that it takes 10,000 hours of practice to become a "professional" at anything. Assuming you did literally NOTHING but eating, sleeping, and practicing at the skill you were trying to become a professional at (and I don't think there's been a single human being in history who has done that), if you were a high-school senior like Buffy was when you started, you'd be well into your college years before you reached that point. From what we saw of Buffy throughout the movie, I'd guess that, ideally, she would have had less than 1,000 hours to prepare for her battle with Lothos - and she didn't even make use of all that time, since we see her engaged in her usual activities in addition to her training.
So unless Merrick was able to transport Buffy into some kind of "time loop" like Bill Murray's character was in GROUNDHOG DAY, I have to think there was something obvious going on there that I just didn't pick up on. In any case, I'd love to hear all your theories.