Su Song was proud of his teleporter. He demonstrated it to the Emperor, moving a dog from the docks to a spot before the throne.
Only the Emperor noticed the dog sway as it materialized. Educated, he suspected conservation of momentum: the dog had been on a different spot on the rotating Earth.
Next summer, the teleporter went on the Emperor’s campaign against Tibet. Rocks from Andean foothills came out of the teleporter at twice the speed of sound. The Tibetans had no chance.
Consider this a friendly, local pub. Make yourself at home, bring your friends, have a good time! Meet new people, have a laugh, enjoy the ambience, and the Oxford commas.