Turn the heat up to high, and then carefully return the pan over the heat, catching the flame from the burner to flambe the bananas. Sprinkle with the cinnamon and remove from the heat. Serve the bananas and sauce mixture over the ice cream.
The Food Network Kitchens recommend that when igniting alcohol, use extreme caution. Remove the pan from the heat source before adding the alcohol. Pour the alcohol into the pan and ignite with a match or click lighter. Return the pan to the stove top and gently swirl to reduce the flames.