Moving tapestry of Barnabas the Barmy

An enormous moving tapestry depicting Barnabas the Barmy's foolish attempt to train a group of eight trolls for the ballet hung on the seventh floor corridor of Hogwarts Castle, opposite the entrance to the Room of Requirement. The small group was portrayed by a forest clearing, and some of the trolls were hitting Barnabas with their clubs.

Behind the scenes

 * According to Harry Potter Limited Edition, there were six trolls rather than eight.

Appearances

 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (video game)