Rocket to the Moon/The Birds - S1-E3
Continuity mistake: "The Birds" - Sheep has the egg in a baby buggy next to the basketball court. She and the buggy are at the side lines. One of the others accidentally hits the ball towards the buggy and Sheep blocks it with her face, scoring a goal. Suddenly she and the baby buggy are in the center of the basketball court.
Rocket to the Moon/The Birds - S1-E3
Revealing mistake: In the beginning of the second half of The Birds, the group is using binoculars to watch a bird flying around in the sky. Frog's movement and line of sight do not match up with the bird's movement. The others seem to do just fine.