I noticed the ability to fire weapons while under water. This struck me quite hard, because in my opinion, it is very surreal;

In real life, when a bullet ''flies'' through the water it either shatters, or the water, being a thick substance, changes its trajectory dramatically.

Second; firing a high-powered weapon submerged may cause the explosive energy from the shell to go backward, into the weapon. Causing it to explode in the operator's face.

But I might be wrong about this.

Your comments?