Wingin It'/Tongue in Cheek/Easy Comb, Easy Go - S1-E11
Other mistake: Easy Comb, Easy Go: At the hair salon, when The Mole spins around Disco Bear's chair, there is an animation error with Disco Bear's legs. His legs are supposed to be behind the seat of the chair, but are instead displayed in front of it, and they are also clipping through the armrest. Additionally, when Disco Bear runs off, his legs clip through the chair again. (00:15:50)