He takes the detonator from the kit bag and without even looking casually presses the trigger. The twin explosions send shudders through the now very unstable road under his feet and he steadies himself on the wreckage of Frank. Then turns to watch as the whole section of road under the swarm creaks and breaks off, crashing down in an avalanche of screeching meat and stone. The remains of the bus follow shortly after. Making sure nothing survives.
He smiles and thinks to himself: Pity nobody was around to see that! That - was art!
With the shot gun reloaded he turns back to see the injured pack leader limping down the hill towards the town. He was going to be operating on foot for a while so slings the shotgun onto his back where it joins Mikey and the two swords.