customers are gold

sometime last year, like november/december, this real asshole of a customer calls and cusses me out calling me an idiot and basically said I have no clue as to what I'm doing and told me supervisor the same.(just cuz I told him dsl line conditioning isnt a same day thing, it isnt.) Cut to today, he can't browse(his switch needed restarting) so I'm trouble shooting and he's jolly, laughing and says:

It's nice talking to someone that knows what they're doing.

Kams(my supervisor mind you) is all, why didn't you remind him you're the 'idiot'. Really, I was too busy stifling laughter. Truly ridic.