Grice Visits the Augean Stables

In WoW:RE, Grice plays with the rather classicist idiom,

"Sorry I couldn't fix the cable yesterday.
I was cleaning the Augean stables"

-- the implicature being that he was onto some hard, of mythological stature, work. "He cannot be meaning that he was in Augis, because we _know_ he was in San Diego".