It’s not often said of cocaine but it’s frequently used by the criminal fraternity because of its aim enhancing effects. They’re simply using it as a performance enhancer. That, and because it smells so fucking good.
Not a Hero uses it as a powerup, as it well should, it’s one of the most excellent sounding pixel shooters ever made.

“When an anthropomorphic rabbit/mayoral candidate from the future named BunnyLord needs a murderous loner to clean up the city during the election, Steve heroically offers up his dubious skills with a gun and lack of self-preservation instinct to this mysterious stranger from beyond,” writes Roll7 in the game’s description.