On the Wrong Track: Part 3 - S4-E18
Continuity mistake: When Joey activates the Celebration of Creation trap card, Rex continues to attack with his monster. In the shot after Joey asks, "What makes you think I'm using this card on your dragon?", there is a shot of the dragon advancing towards Joey before it is stopped, where Joey's right arm is extended to the right. When the shot cuts, his right arm is bent at the elbow and his forearm is raised. (00:05:25)