Grappling with a Guardian: Part 2 - S4-E31
Continuity mistake: When Yugi summons Dark Magician Girl to the field in defence mode, another version of the card appears beneath it. The corners of the card are hovering over lines of light on the floor, caused by the Seal of Orichalcos card. A few seconds later, when Yugi ends his turn, the card appears to have moved away from the lines of light, as they cannot be seen on the floor under the card. (00:16:53)