Put butter in a skillet over medium heat. When butter sizzles, add brown sugar and stir 1 minute.
Add orange juice and cinnamon and mix to smooth.
Add bananas, coat well, and cook 1 minute. Add rum, raise heat to medium high, and carefully ignite the mixture; cook, swirling mixture until flames subside and mixture begins to thicken.
Spoon over frozen yogurt or ice cream in a goblet or cut-glass dessert dish. Buon Appetito!