First person falling and swimming animations

Somehow Gmod has a new feature, and I really don’t recall downloading any addon that’d do this. And I didn’t see anything in the latest patchnotes… so anyone got an idea of what this is?[/t][t][/t]

Either this is an old feature I never ran into before, or a server I was in had this addon and I never knew. Even then searching for “swimming” and “falling” on the workshop shows nothing like this.

GMod doesn’t have that by default , it’s definitely coming from the far cry 3 addon ( base + weapons ).

I use the base + CS:GO weapons, so that must explain it. Thanks.