What would you do if you were at a restaurant and saw a man propose to another man?

[the naked truth]

He would get down on one knee beside his partner and propose while you were having a nice dinner with your family/lover/whatever. Would you stare? clap + cheer? say something nasty? Avert your virgin eyes?
Don't tell me what I should do....I'm wondering what YOU would do. (I'm the gay one here lol)