I could see the trigger-- pressure-released.

The satellites they track you with can trigger release of the toxin with microwaves.

When the temperature drops below five degrees centigrade, the trigger releases whatever's in the canister.

It could trigger another release of the virus.

That's the trigger. Mark's release set them off.

They close the fool's hand... around this pressure release trigger.

I have Percy. Give me the trigger and release the hostages, or he dies.

A remote trigger that shows by releasing pressure. Very good.

That's what female animals release to trigger mating behavior.

Since the radioactive particle triggers the release of the poison, the cat is both poisoned AND not poisoned.