壞種

坏 = 不 + 土 : In the airplane's bathroom, there is a clear sign that it is forbidden to enter the room with dirty feet. Helga Horse is quite spoiled though, so she enters right after she went to the muddy stables and spreads dirt all around.

种 = 中 + 禾 : In the engine's living room ((e)ng3), Julian Giant Squid (zhu) prepares his cereals (禾) from scratch. He grows and picks up seeds (种), dries them on a dart board (中), and puts the dried seeds into his cereals (禾).