Vince ponders a moment, rubbing at his chin, but then gives a grin as it comes to him, and gets to work. Jack may notice from the pooka's movements and smooth grasp of this tool, that bottle, that he has already familiarized himself with the layout here - that, or he is genuinely practiced behind a bar.
The drink he makes is one that Jack will likely recognize - an absinthe sazerac. Not one that you can simply create from a recipe, the flavours must balance on a knife edge to hit the perfect balance.
Rye whiskey into a glass washed with laphroig, a spoon to hold a cube of sugar upon which the green wormwood liquor is dosed. His fingers snap a few times, gesturing as though he is holding a lighter that just won't quite catch - click...click... and foom, a spark that lights the sugar cube to flare up in a greenish gold flame. It dances for a moment before being extinguished by a squeeze of lemon, quickly shaken with a cube of ice, and strained to top off with just a spritz of soda water.
"A Da Vinci, my good man."