Though, to be fair, you can wreck and ankle pretty bad and have nothing show up on an X-ray.
A couple years ago I hurt my ankle and went from a sports PT saying "Ah, you're likely ok, just a bad sprain." To getting an X ray and the doc saying "Nope, it's broke on the outside, you should get an MRI." To the MRI person saying "Ohhhhh, yeah, you broke both sides of your ankle."
So the x ray caught one break, but not the other...