Postal 2 rocket launcher v_model animation?

Good day facepunch

I just so happen to have finally played postal 2 (may god forgive me for not playing this masterpiece earlier) and I’m loving it. It also struck me how badass looking is the animations when charging the rocket launcher, when the dude does the rock and roll gesture before shooting. It also looked rather familiar, and it gave me the impression of having seen the same animation for a swep in gmod, I’ve asked a few people and they aswell recall seeing something like that although neither of us can find it, and I’d love to have it

Does it actually exist? Have I just been drinking too much and imagined it? Where can I find it? When will valve release episode 3?