Why hasn't some enterprising makeup artist accurately captured the myriad of organic matter that can - at any time - slough off a dead body?
Why is it that nobody considers the unspeakable trail of detritus that must follow wherever a zombie may go, the extent that a horde multiplies said leavings, and the logistical and gastrointensinal challenges that must await any soul who wishes to cross their past path?
Oh, that's right! Because it's the worst thing any person should ever have to see and he will - ironically - take this night to his grave. Do you want to know how poor Timothy Crompton made it to this tower, when so many others did not? It was because this was the least undesireable of the options set before him.
What's that? You want to know how he discovered the secret passage that led him helplessly into the clutches of a terrible vampire? Oh, that one's easy.
It's because the universe decided he hadn't suffered enough.
Timothy froze, halfway to stuffing a pillow into his bundle of things, suddenly feeling lightheaded for some reason. Perhaps it was the color simultaneously draining and flushing from his cheeks? Perhaps it was realization that he was caught in a trap most perilous and inescapable? Perhaps it was the thought that those noises he heard so long ago were muffled by two windows and at least fifteen feet and there could be plenty of nuance that he'd missed STOP IT YOU STUPID BRAIN CAN YOU PLEASE THINK OF SOMETHING USEFUL
"Not any more new than the other freshman. Sir."
Antagonizing your soon-to-be killer: Brilliant start.
He gulped audibly, and continued. "I'm terribly sorry about all this, I hadn't the slightest idea you were here. With all the commotion, I was...looking for a quiet corner to study in. I found my way here, you surprised me, I dropped my things, you started talking, I started talking, I'm still talking, I haven't quite stopped yet, so I will get on that immediately." He clamped his mouth shut, and assumed his best, most deferential parade rest. Yes, nothing at all to worry about from this meek student of yours. Totally harmless. You can let him go at any time, with zero consequences or regret. "I don't suppose you'd have a closet I could...camp out in?"
[I choose Timothy gets awkward and embarrased.]