Is it possible to pause the animation?

[tachi 10]

For example, when soldier is pressing G now, he instantly throws a nade. I wanna make a mod that allows player to cook a nade before throwing it away. For example while he is pressing G he holds nade in hands and after i release G he throws it away

[Waffle_SS 11]

player enableSimulation false;

This will freeze all animations on the player, although that may be a bit overkill for what you want to do.