It is called an acciacatura. You play the first note (open) very quickly and hammer on to the note on the first fret. the next note you play as a normal 1/8 note. Listen to my recording. Listen to the one used on my video called "Not A Soul".
Thanks, sometimes it helps to justify my UAS by telling myself that I'm just buying more subject-matter to take pics of. Ohhh, I'm jealous that you were just at Ko'Aloha. I've been planning my next trip since the plane lifted-off from Lihue! I'm glad it was so memorable for them! They're such an amazing group of people. I'm hoping to visit them again after the wedding.