It seems their official explanation is that Ryan got in his way and distracted him into whistling. Expect them to fine Rex and pass off the "makeup yards" under the "palpably unfair act" rule.
It is worse than the "Throwup" because at least that can be ascribed to the referees' viewing angles.
It is right up there with "Just give it to 'em" although I am not sure it is worse.
I think the fact that Mario Williams spoke up is really problematic. He doesn't tend to say a lot and really got going on this topic. It's got to be fixed.