Mix butter and brown sugar in saucepan. Cook over medium heat until it is caramelized. Cut bananas into quarters. Add the bananas and cook until tender. Add cinnamon and liqueur; stir. Add rum/brandy/vanilla to top of mixture (DO NOT STIR) and light it, as in strike a match, as in set on fire. Spoon over vanilla ice cream. No, no, you won’t get drunk; the flame burns off the alcohol.