The Fairly OddParents - Season 2 Episode 16 -

After being disappointed by the Camelot Fair (the knight is shorter than he looks, the Magician is a cleaning product salesmen, and the Dragon is only a dog wearing a dragon mask that even it is afraid of) Timmy wishes that he was in the real Camelot, but Timmy's parents somehow come along with him and are about to be eaten by a dragon.