How Stuff Works!!!

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“How Sword Swallowing Works”

Some people think of sword swallowing as a magic trick. After all, as with most magic tricks, sword swallowing doesn’t seem like something that should be possible. It can be a little easier to accept the idea that it’s all an illusion than to believe that a person can guide a long piece of metal all the way into his stomach.

Several sources support the idea that there’s a trick to sword swallowing. Famed magician and escape artist Harry Houdini wrote about sword swallowing in “The Miracle Mongers, an Expose.” According to Houdini, some of the sword swallowers of his time swallowed metal sheaths before their performances.

There is a trick to real sword swallowing, but it doesn’t involve illusions or preemptively-swallowed metal tubes. Instead, it involves lots of physical and psychological preparation.

The act of swallowing a sword is an interaction between two fundamentally dissimilar objects – a human being’s upper gastrointestinal (GI) tract and a sword.You can think of the GI tract as a living scabbard that the sword slides into.

To know how it really works, refer this link http://entertainment.howstuffworks.com/sword-swallowing3.htm