Girls, what would you do if you were out with a female friend of yours and her boyfriend, and he refused to take his sun glasses off?

And the reason he refused to take his sun glasses off is because of a pair of nasty black eyes that were courtesy of the girlfriend, your female friend beating him. How would you handle it? Would you say or do anything?

Let's add to this that he confided to you that he did not fight back, that the fight was over something petty, and she has done this multiple times before.
Girls, what would you do if you were out with a female friend of yours and her boyfriend, and he refused to take his sun glasses off?
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