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The cannon went off by accident.

water cannon

When the cannon hit the ship only a few survived.

They have a boat with a powerful cannon.

The cannons used in the Civil War were very heavy and difficult to move

O.K. gentleman, check your cannons here.

Ships used cannons in battle in the past.

Never use a cannon to kill a fly.

The sound of a kiss is not so loud as that of a cannon, but its echo lasts a deal longer.