Diwali festival and the Tubri fountain

Diwali is an Indian religious festival celebrated one time in the year between mid-october and mid-november, also known as "The Festival of Lights" that celebrates "the victory of light over darkness, god over evil, and knowledge over ignorance". During Diwali, people wear their finest clothes, illuminate their homes with oil lamps and, of course, light Fireworks! Talking about Diwali and India, I remembered an Indian Firework type I have seen on Youtube some years ago called "Tubri". Tubri is a terracota / clay fireworks fountain filled with a black powder like composition that makes a really high column of sparks, sometimes something around 70 feet high.

A Tubri fountain (image from https://ruralindiaonline.org/articles/the-tubri-competition/)

In the video below, the guy shows the simple but interesting process of making a Tubri:

Besides the "normal" Tubri, there is also the "Flying Tubri", I think the effect is caused simply by throuing the Tubri into the air by hands (I think it is very dangerous, but the effect is really beautiful), so it acts like a rocket as you can see in the video below:

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Heavy smoke in Copacabana Fireworks Show

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