What you do for this game is you use a an image...can be moving or otherwise...or a verbal clip in your character's (face claims) voice.
You use it for your character saying something in reaction to the person above them. You use your character's face claim for this. It doesn't even have to make sense. Can be funny or serious. You can write stuff beneath it if it doesn't have enough. Use a blank image and make the commentary.
You comment on the avatar directly above you but you can include the ones above that.
*stares at some young woman who he doesn't like at all and is trying hard not to go off on. she won't shut up*