Anastasius' poking fun at Valentinian's angry muttering about everything.
Anastasius: You know, if you ever get tired of being a soldier, I'm sure you could make a good living as a miracle worker. Turning wine into vinegar. [...] Wine into vinegar. Yes, yes. And then—! The possibilities are endless! Turn fresh milk sour. Make puppies grim. Kittens, indolent. Oh, yes! Valentinian of Thrace, they'll be calling you. The miracle worker! Everybody'll avoid you like the plague, of course. Probably be entire villages chasing you with stones, even. But you'll be famous! I'll be able to say: 'I knew him when he was just a simple nasty ill-tempered disgruntled soldier.' Oh, yes! I'll be able—
Valentinian: *mutters angrily*