MCing for the first time the other night, we came to a point where one of the local hardholder's soldiers, a fellow named Barker, had taken just about enough lip from the PC Hocus, Truth. Barker stepped forward and Truth correctly read his intent to kick Truth in the side of the knee. So far so good.
Truth grabbed for Barker's throat, intending to intimidate him and prevent his attack, establishing dominance without necessarily dealing significant harm. I initially called that a Go Aggro, but after the roll I realized that none of the results really fit the situation, so I switched it retroactively to a Seize By Force; Truth chose to suffer little harm, and to impress/dismay/frighten. Barker took 1-harm; Barker's intended 1-harm kick became 0-harm, and the harm roll made Truth lose his grip on Barker, who fell to the ground - he kicked himself out of Truth's grip, basically, and was intimidated enough to stay down, and that was the end of it.
I'm happy with the outcome in the fiction but still not sure it was the right mechanical option. It seems wrong to decide Seize By Force vs Go Aggro by looking at the list of possible results rather than by the actions and intentions. In this case the stakes weren't super-high, and it worked out great, but I'm curious what other MCs would do in similar situations, and why.