This clock is running using a mainspring.

He was involved in the development of guided missiles.

He threw a smoke bomb to obstruct the enemy's view.

He fired a round shot from the cannon.

The police used tear gas against the demonstrators.

He knows how to defuse a bomb.

The police found a car rigged with a bomb.

He likes to take a walk in the park at dusk.

She described the pain of a broken heart as tears.

I don't know a thing about him.