Actions Allowed by Equipment, Destroying, and Continuing

I was just thinking about this funky hypothetical situation last night. I didn't know the answer, and a brief search didn't yield anything terribly helpful. Suppose a vampire is using a piece of equipment to do an action. Could be rush from a Talbot's Chainsaw or perhaps a Bleed at +1 bleed from Seal of Veddartha. This vampire is blocked. During the course of combat, the equipment allowing the action is destroyed, but there are several presses or prevents, and the acting Meth cycles into a Form of Mist (or other continue action combat card) and exits combat successfully. What happens to the action? I'm guessing it just "fizzles" at that point. But if this is the case, at what point does it fizzle, as soon as the equipment is destroyed, or as soon as the current combat has ended? Thanks. Jeff

[ quoted text not captured ] At action resolution (assuming it isn't blocked again). The classic example was Bomb. [RTR 19960221]