Inter-Dimension Detention - S3-E16
Continuity mistake: When Crowler and Bonaparte scream after seeing Sapphire Pegasus, they are shown facing the monster directly. There is quick cut to Sapphire Pegasus holding Winged Kuriboh in its mouth, but when the shot cuts after that, Crowler has rotated 90° and Bonaparte has turned around entirely to face the other characters. (00:05:04)