[Polynikes]

“The Russian bartended also had a bottle flavored with some kind of green grass, which he added to the bottle —this version tasted even better”

It probably was Bison grass. On a side note the Ukrainians added St. Johns Wort for an infusion in their home brew.

St Johns Wort was what Prozac was developed from. It added flavor and effect. Personally I prefer Belvedere

[Veto!]

Yep, Bison or Buffalo grass. You can buy bottles of Buffalo Grass vodka online, very pricey . Going to buy a bottle next summer.

St John’s Wart? Interesting but I have no clue what it tastes like, do you?