The image depicts the process of the sword going through the sphincter and straightening the upper gastrointestinal tract when it is swallowed in the swallows stomach.
This is what happens when the artist needs to do so to swallow the sword into the throat
Tilt your head back and stretch your neck to allow your mouth, esophagus to line up, now the throat and throat are stretched out.
Move the tongue away from the path of the sword and maximum throat relaxation.
Aligning the sword is parallel to the upper gastrointestinal tract and gradually passes the sword through the mouth, throat, throat, upper esophageal sphincter, and finally into the esophagus. Saliva is released as soon as the sword is inserted into the mouth to help lubricate the path of the sword. Vegetable oil is also used by some people as a lubricant to help the sword move more smoothly in the body.
In the process of going deep into the body to the stomach, the sword will straighten the curves of the esophagus.
This process is very dangerous, high risk, so it requires carefulness, accuracy and accuracy to every mm. With only a little distraction, the sword could deflect or puncture the gastrointestinal tract.
Note : Swallowing a sword is a dangerous performance, to make the performer have to work hard for a long time. In order to avoid possible accidents, readers are ABSOLUTELY NOT TRYING TO FOLLOW!