Page 1 of Cape Fear

Has anyone experienced any problems with this r2 disc (1991 version).
I have notice a rather strange artefact that actually speeds up the frame for a split second. I know this is not as a result of a disc skip so what could it be? The most noticeable sequence is the the part wehn julieete lewis is talking to her friend in the school just before she meets her new supposed art teacher. As she approaches the double doors leading to the art department she sort of hops towards the door. The movement for a split second seems faster than it should be. I suppose this could be a authoring problem but i just find it strange that i have not seen any other people reporting this fault. I would appreciate any suggestions as to what this could be.