20:44 [Akina] to [un4GOT10] In my time as a student, we tried a self-burning cognac... chemists poured half a kilo of oak peppers into a 20-litre bottle, poured 9 liters of alcohol to the top of the water - and sent it all to the working chamber of a cobalt gun for a month and a half. Believe me, most of the famous cognac nervously smoke around the corner.