This is the result of a gunshot underwater, in a pool. He has posted on YouTube the former Marine Andrew Tuohy. In one of his blog entries talking about weapons of underwater shooting video and how to make caps in brooches.
This former Marine, according to the Daily Mail uk , experiment with different weapons and bullets to achieve effects that considered “evil beauty “.
Myths about shooting underwater as Microsiervos.com an article states that ” if you were in the water and shoot someone with a gun or a rifle from the vertical, you’d practically dive safe with about 2.5 to 3 meters” and explains that ” when a bullet fired underwater, it also makes a lot of noise and leave bubbles”, as you can see in this video.