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?

http://cloud-4.steampowered.com/ugc/55483889901850070/EE6EEEBA42309B1D46F260CD02E3446D054BBAA7/[/t][t]http://cloud-4.steampowered.com/ugc/55483889901847778/C5375E306B856C94F86C2984D5E86049CCCC684C/[/t]
[t]http://cloud-2.steampowered.com/ugc/55483889901854044/9C3E15952563915FA3E7C60A2764565599CABF70/[/t][t]http://cloud-4.steampowered.com/ugc/55483889901852489/970223E7F86AB91E1966F7D358B3661091154F78/

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.