Harry Potter Moment of the Week is a weekly meme hosted by Uncorked Thoughts
I don't know if this technically counts as a prophecy, but it is one of my favorite moments of Professor Sybil Trelawney being a Seer.
'Two of spades: conflict,' she murmured, as she passed the place where Harry crouched, hidden. 'Seven of spades: an ill omen. Ten of spades: violence. Knave of spades: a dark young man, possibly troubled, one who dislikes the questioner - '
She stopped dead, right on the other side of Harry's statue.
'Well, that can't be right,' she said, annoyed, and Harry heard he reshuffling vigorously as she set off again, leaving nothing but a whiff of cooking sherry behind her. -Harry Potter and the Half-Blood Prince (Chapter 10, page 195-96)
I love this moment because it makes me think SHE'S REALLY NOT A FRAUD, SHE JUST DOESN'T KNOW IT! It would be so funny if she was actually a lot better at being a Seer than anybody, including herself, knew. If Professor Dumbledore had witnessed this scene he might have been forced to give her a pay raise.