The phrase "loose cannon" comes from the ships from 17th to 19th century. Ship's guns were cannons mounted on wooden wheeled frames and restrained by ropes to contain the recoil. They could weigh 3-4 tonnes. If the ropes broke or were shot through the cannon could break loose. It would then roll about the deck flattening everyone on its own side, causing havoc and could actually lose the...

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Scotland flag - the saltire Made In Scotland. For Scotland.
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