摔壞

摔 = 扌 + 率 : Sheldon Shrimp (shu) drops his toy claw (扌) in front of the airplane (ai1), and the shock soon gets replaced by amazement as he realizes that the toy claw broke (摔) exactly according to the golden ratio (率).

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.