Harry Potter and the Chamber of Secrets

Visible crew/equipment: When Harry and Ron are under the invisibility cloak in Hagrid's hut, Hagrid, Dumbledore and Fudge are joined by Lucius Malfoy. In the wide shot as Malfoy steps in, all the mats - their marks - are visible under Malfoy, Fudge and Dumbledore. Then later Dumbledore says, "If the governors desire my removal, I will of course.." and in the shot facing Malfoy as he finishes, "..step aside," the mat that Malfoy now stands on is visible as is the blue mark behind his feet. It's also visible in an earlier shot after he announces the order of suspension. The mat at the foot of Hagrid's chair disappears as well. (Visible on fullscreen DVD.)