They said, "Well, it kind of looks like a tail." Even though we put a passive bar there. "Do animals use their tails when they climb up walls?" What they were doing was returning the favor, by giving us a hypothesis to test, in biology, that we wouldn't have thought of.
Dijeron, "Bueno, parece como una cola." A pesar que lo que pusimos es una barra pasiva. "¿Utilizan los animales sus colas cuando trepan las paredes?" Lo que hicieron fué devolvernos el favor, dándonos una hipótesis que probar, en biología, en la que no habríamos pensado.