Ooo- somnambulate. Good word. Ate up the majority of the syllable count too! I had to look it up, never heard it before...
I had to sound it out- galeón, to make sure it was three syllables... It is, of course- but the way I said it, without proper enunciation, the first time was only two...
So- a technically perfect Haiku! !YaY! Awesome word usage too!
Sleep-plank-walking...
There is a rude awakening!