Harry learned things that he hadn't known before, even things the boys on the quidditch team didn't know, they knew that there were seven hundred ways of committing a Quidditch foul but had no idea that all of them had happened during a World Cup match in 1473; he already knew that Seekers were usually the smallest and fastest players, but hadn't known that most serious Quidditch accidents seemed to happen to them, which scared him more than he would admit to anyone other than Hermione; and that although people rarely died playing Quidditch, referees had been known to vanish and turn up months later in the Sahara Desert, although that fact made him laugh despite his fear of playing a real game for the first time. He knew it would be way more different and brutal than the games he had played with his friends growing up, same balls and rules but smaller field and training Snitch and training Bludgers which were soft at his Mother's insistence.