Ernest Hemingway once claimed he could write a great story in six words or less. His story:

For sale: baby shoes, never worn:

Margartet Atwood once wrote:

Longed for him. Got him. Shit.

Here is a site dedicated to ultra compact stories for the snack size addicted web age

http://www.sixwordstories.net/

And there is a book dedicated to six word memoirs

http://www.npr.org/templates/story/story.php?storyId=18768430

There is infact a cottage industry around six words. Just Google "six word stories"

Tweets compared to this are never ending novels...