That's certainly one way to stop a thief. Olivia stops her attempt at chasing after the culprit with the bellow of hold it, asshole and doesn't begin again when she sees what weapon of choice the man is using. Is that his dinner? It doesn't stop the thief, but it does make them drop the knife -- Olivia will let the unfortunate presumed Barrayaran go this time, in the interest of securing the knife.

"Do you normally favor such an unusual weapon?" She asks, turning back to the stranger once she's reclaimed the blade from the snow, turning it over in her gloved hands to inspect it. "Or was that a moment of fortunate improvisation?"