Call physicist Andreas Wahl the deep sea aquamarine Harry Houdini. The wet magician. The merman wizard. The ballistic Poseidon adventurer.
You can call him any of these monikers but, before you do, call him a smart man, because he is. Being wise he knows that when you fire a bullet from a rifle underwater, the munition functions a lot differently through liquid than air. He knows that, in liquids, the molecules are a lot closer together, thus doing a pretty number on the bullet’s speed and effectiveness in … piercing someone’s body.
In the following case in the footage below — it would’ve been his. Watch what happens though: