This animatic picks up in the middle of one of the episodes that I pitched:
Two brothers are asleep. The younger brother wakes up frightened to see mysterious eyes peeking in the night. He then notices his older brother sinking in quicksand and goes to rescue him. After pulling the older brother out they both sit in silence as they ponder about the weirdness of the beach. From the bushes we see the perspective a mysterious on-looker.