There was a montage on YouTube of people in SO MANY movies asking some variation of "You really don't get it, do you?" Now I can't unhear it when it pops up in a movie.
-Shaky Cam
Name of the film in the film.
If done well, it acts like a cherry on a sundae; in inexperienced or clumsy hands, it is an entire container of salt.
I remember there being a funny little thing about that on Family Guy years ago. Anyway, like you said, sometimes it works, like in something silly like Hot Tub Time Machine, when Craiig Robinson's character looks right at the camera as he delivers it. However, it would've been terrible if after Bruce tells Alfred about becoming a Sybil and all that, Alfred leans back and says "so, Batman Begins."