What is a Haiku?

Haiku, according to Wikipedia, is a form of Japanese poetry, consisting of three metrical phrases of 5, 7, and 5 syllables respectively. In Japanese, haiku are traditionally printed in a single vertical line, while haiku in English usually appear in three lines, to parallel the three metrical phrases of Japanese haiku. I think that they are alot of fun to write. Just open up your mind, let the words come and count on your fingers as you write them down.