Haiku?

What is this…
without seven syllables – here?
Haiku?

What is this…
that needs not rhyme?
Haiku?

What is this…
with so many sets of three lines?
Haiku?

What is this…
a joke, mystery or surprise?
Haiku?

(Haikus are traditionally three-liner poems structured in a 5-7-5 syllables manner.
While their second lines connect to the first, the third line surprises.)