蹭飯

蹭 = 足 + 曾 : The firefly (曾) is too lazy to fly on its own. To get to the other side of the engine's bathroom ((e)ng4) it is freeloading (蹭) by hanging on to a football (足) thrown by the King of Chu (c).

饭 = 反 + 饣 : In the anthill's bathroom (an4) the protester (反) is protesting against the eating of Chinese crullers (饣) because they are so unhealthy. He rather wants Frankenstein's Monster (f) to eat a healthy raw vegan salad (饭). Frankenstein's Monster is quite happy with his cruller and beats the protester with his cruller on the head to let him know that his suggestions are not welcome.