Corrected entry: When Harry is preparing a new Quidditch team, and after Ginny shouts for everyone to shut up, there is a man walking behind the goal posts in the background. Normally this could be just any other character, but the man is wearing regular trousers and a long shirt or jacket.
Greg Dwyer
12th Nov 2016
Correction: Everyone is wearing normal clothing. It could easily be another student.
Greg Dwyer