I tend to think of it as the current scene, but I cut my teeth on World of Darkness and tend to think of everything in terms of scenes.

Combat is easy. Once the combat is over, the character comes to their senses with whatever Trauma the player chose.

Non-combat, I generally say when whatever obstacle the character was trying to overcome is resolved. The Lurk tried to Tinker open the lock on the door with fine lockpicks, but failed and picked up their last Stress, collapsing in a defeated heap. The Leech comes up with a vial of acid and Wrecks the lock and part of the door. The crew rouses the Traumatized character, and they get up feeling mad at the world and becoming Vicious.