Cool video, from August 3, captures a man using sand to make popcorn in Can Tho City, Vietnam.

The sand is heated before corn or sticky rice is added to quickly become popcorn. Sand prevents the popcorn particles from flying out of the pan as they expand.

This genius method has long been a common way of making popcorn in the southwestern provinces of Vietnam.

Video captured the moment of the man was using sand to make popcorn in Can Tho City, Viet Nam.
This is a way of making popcorn by people in the southwestern provinces of Vietnam. They will use the sand to enter a pan then heat the sand up. After the sand reaches a high temperature, they will pour corn or sticky rice and stir. Less than 1 minute later, the corn kernels will expand and quickly become popcorn. They then use a sieve to remove the sand back to the pan. The corn flakes are transferred to a smaller sieve for final cleaning.
The use of sand to make popcorn helps the people here to control the temperature as well as prevent burnt popcorn. Sand will prevent popcorn particles from flying out of the pan as they expand.
This is a method of making popcorn a long time ago and is still used today.