Michael searches the jungle for Vincent, regretting his earlier promise to Walt that he'd find the dog as soon as it stopped raining (whereupon it immediately stopped raining). He hears something growling, but fairly immediately realizes it's something more dangerous than Vincent. He runs from the area onto the beach . . . and right in front of a topless Sun, bathing at Jin's earlier request.
A brief section plays the mystery theme.
Right before this scene, Michael promises Walt he'll find Vincent as soon as the rain stops. Immediately after saying this, the rain stops, forcing him into the "haunted damn jungle." When he runs into Sun, Michael proves himself equally verbally incompetent.