Place this clip right before the reckless act in your edit, after a Dun Dun Dun cue, so the warning interrupts the build-up. If the character ignores it, follow with the MLG Air Horn to mark the chaos that follows, keeping the warning as the turning point of the scene.
About this sound
This 12-second clip is a firm spoken warning telling the listener not to pull the fire alarm and to stay away from it, delivered in a direct, no-nonsense voice. It feels urgent and stern, with a touch of comic overreaction that makes the warning land harder than a plain instruction. It works as a quick verbal stop sign for reckless behaviour.