Take a shot glass and add three coffee beans in it.
Now take one ounce of black Sambuca and pour it into the shot glass containing the coffee beans.
Take a long lighter or a match stick and set shot glass filled with Sambuca on fire for not more than ten seconds.
Now cover the shot glass by your hands to blow out the fire.
Now inhale the air created underneath your hand and then drink the shot while it's still hot.