Sometimes it is hard not to wonder whether that cascading mass of hair atop Ma'a Nonu's head is merely the tip of the iceberg. That beneath the cranial crust there lies oodles more, a dense forest that prevents full synapse connection in the cerebral region.
It's not quite right to diagnose him as hair-brained because there are sporadic, even prolonged periods of clarity when Nonu inspires more than he frustrates.
But he did much more frustrating last night, perhaps understandably given the trepidation he must have felt returning to Eden Park after breaking promises and a binding contract to get away.
He knew he would be cast as pantomime villain and he warmed to the role, providing ample reason midway through the first half for a major boo and hiss when he clobbered his supposed best mate Piri Weepu with an ugly and reckless shoulder charge.
The most bizarre part was that it had the hint of premeditation about it. An unreported tiff or the actions of a man out of form and under pressure?