Life's Ruff - S1-E20
Other mistake: When Hip tosses the wand to Hop, part of the background is coloured in like Hop's head. (00:02:43)
Life's Ruff - S1-E20
Other mistake: Despite Hip peeking from the girder, he cannot be seen behind them. This also happens to Hop shortly after when they are pulling the astronauts behind there. (00:09:06)