Breaking a conduit bond before the exchange is complete is always dangerous but this was ... clean.

[She tips her head to the side, an idea occurring to her as she tries to follow the flow of the magic (18). Odds that Barnet would cut and run like this is small. Not without his prize. A witch like that, centuries old would not just snap the bond with no reason.]

Almost like someone ran a knife through it. Metaphorically speaking.