During the match in Sorcerer's Stone in which Quirrell and Snape are jinxing and counter-jinxing Harry's broom, WHO "seized the quaffle and scored five times without anyone noticing?" (edited at 4:41 pm, July 22, 2017 (EDT))
Original question: During the match in Sorcerer's Stone in which Quirrell and Snape are jinxing and counter-jinxing Harry's broom, WHO "seized the quaffle and scores five times without anyone noticing?"
Marcus Flint