Was it this bit?
"He didn't have any choice," said Harry. "Not if he wanted to fulfill the conditions of the prophecy."
"Give me that," said Professor Quirrell, and the newspaper leaped out of Harry's hand so fast that he got a paper cut.
Harry automatically put the finger in his mouth to suck on, feeling rather shocked, and turned to remonstrate with Professor Quirrell -
Earlier in this very same chapter, Harry tells Quirrell that he can't imagine Quirrell hurting someone unless he means to. (This was in context of their discussion of the Gryffindor who cast a dark curse without knowing what it did.)
So we can assume that either Quirrell isn't as precise as Harry thinks and accidentally hurt Harry, or that he's exactly as precise as Harry thinks and took the blood on purpose.
The next discussion thread is here.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 85. The previous thread has long passed 500 comments. Comment in the 15th thread until you read chapter 85.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.
As a reminder, it’s often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: