A heated battle of words between gentlemen/intellectuals. Less likely to involve physical altercations, more likely to involve cane/glove altercations.
Two upright individuals are quietly debating when one feels the other becoming too aggressive or is actively trying to instigate an altercation. The light in the immediate area dims and classical pump-up music starts to play (something like Mozart - Dies Irae) as they begin circling one another. This would be a "classic" case of some intense sophisticuffs.