Mario VS Sonic (Nintendo VS Sega) - S5-E13
Continuity mistake: Mario kicks Sonic away in the lawn chair and the chair lands on the beach open but sideways. The folding back of the chair is extended fully back open while it's in this position. Then when the hordes of cat Marios are mauling Sonic, the camera pulls back to show the lawn chair again with a seagull perched on top of it. Suddenly the back of the chair is partly folded in now, despite it being in the same position. Also the small alcove of trees in the distance is suddenly much further away. And yes, the bird does move the chair later and is seen sitting in it, but at this point it has not, and is just perched on top. (00:15:30 - 00:16:40)