He arose from slumber and noted the ferrous-like qualities of his cloven nose

A while ago, sometime after finishing A Feast for Crows and during the 6 year wait for A Dance with Dragons, I promised not to read any more of a Song of Ice and Fire until the series was finished.  The TV series is making me break that promise, so here I am reading A Dance with Dragons. 

Without spoiling anything, the first chapter after the prologue is from Tyrion's POV.  Within it, we are told:

He woke naked on a goose-down feather bed so soft it felt as if he had been swallowed by a cloud.  His tongue was growing hair and his throat was raw, but his cock was as hard as an iron bar.  [emphasis mine]

Dozens of pages later, but in the very next Tyrion chapter:

When he woke his stunted legs were stiff as iron. [again, emphasis mine]

I'm hoping that this is the start of a book-long, nay, rest of the series-long in-joke by the author in which every Tyrion chapter has him wake up and compare some part of his body to the element with atomic number 26.