"He Poured the First Bait"

Initially, my curiosity was about a deep well full of clear water down there. I had a pump (eager to learn), but it was dry and just hissing fruitlessly. Explanation: Orange was the "fishing water." He came and poured a small glass of water into my pump. Just a glass of water. But that small action created a vacuum, and suddenly the pump began drawing water from the well with a torrent. He wasn't filling my well; he was just priming it to flow.