5 word story/haiku

one of my former students is doing a project on face book using the 6-word story idea, which she has cut down to 5 words.....it got me thinking about the very real difference between this and a haiku, especially since haiku poets in english have largely abandoned the 5- 7-5 syllabic rule b/c of the huge difference in language and language portrayal [i.e., alphabet].  anyhow sometimes a 6-word [or 5-word] story can also be a haiku, and i think the one i gave her probably fills the definition, so here it is:

summer...
ghosts in every leaf.