Those of you up on the traditional interpretation of Scripture will understand the flying cow. Others may be wondering about the Angelic Ox: it's a figure associated with St. Luke. In Revelation, the Four Living Beings with their various appearances are associated with the four-fold Gospel and the writers thereof. So St. Luke gets an ox in his portrait.
That may surprise you. But would I give you a bum steer? Just don't have a cow over it.