According to the video’s source, the military members shown are British soldiers, in the winter of 2014 in the Helmand province of Afghanistan. They were attempting to carefully set off a controlled explosion of an IED (improvised explosive device) when something went horribly wrong.

Watch as they come within inches of being victims of their own detonation. It’s scary as hell.

https://www.youtube.com/watch?v=neY8FDIbRsM