Humor [in a scene] is not jokes. It is that attitude toward being alive without which you would long ago have jumped off the 59th Street Bridge. ~ Michael Shurtleff
The believability in comedy is being able to take something from daily living and stretch it into a humor that is seen as annoying but funny at the same time. It is in these actions where most actors utilize the understanding and allow it to make its way into a scene to make people think while seeing a reason too laugh as well. As actors it is there job to bring you into those moments and see all the humor abnormality and seriousness of not only the actions but what they may be saying that is made to be a moment called tragic comedy. So now you walk away smile or laugh but here is the big part did you get the message?