What do you do when...

... another person in the room farts audibly? Do you laugh and point? Do you ignore them completely and stop breathing? Do you say "excuse you"? I guess this largely depends on the situation you're in. In the comfort of my home I always call it out and yell "Vina!!!" in a playfully-annoying tone... although I can't do that anymore. :(

I was just in a brainstorm meeting with a few colleagues when one let 'er rip as he stood up to make a phone call. I politely ignored it (I was mid-sentence) but it got me thinking about what others in the room were thinking, and what the appropriate response was.