A mouthful the throat cannot clear easily
The challenge’s difficulty comes from putting a large amount of dry powder in the mouth at once. Saliva can wet some of it, but cinnamon does not dissolve like sugar; the powder can remain gritty and spread across the mouth and throat. Swallowing and breathing then compete for space, and a person may cough or gasp while trying to clear it.
How powder can get into the airway
The windpipe has protective reflexes: the epiglottis helps direct a swallow toward the esophagus, and coughing can eject material that reaches the airway. But a sudden breath taken amid coughing can draw fine particles past the voice box. This is called aspiration—material entering the breathing passages rather than the food pipe.
Once there, particles can irritate the airway lining and provoke more coughing, wheezing, or shortness of breath. The cough is a defense, but it can also make the episode feel more panicked as the person struggles to breathe and clear the powder. People with asthma or other breathing problems may be especially vulnerable to irritation.
That is the risk hidden in the challenge’s simple rule: the body is being asked to swallow a dry, hard-to-clear mouthful before it can safely reset its breathing.
