In the Kokiri Forest, Link needs to collect enough rupees to buy the Deku shield. He could look for the Kokiri sword, but he'd rather have the shield first. To do this, he picks up piles of grass and throws them on the ground, hoping to find some rupees.
Suddenly, Link pulls on a strange sprout and lifts a bizarre little yellow creature with big ears into the air. Not caring about it, Link throws it violently to the ground. The creature dies and in its place is a Gold Rupee.
Link collects the rupee and, seeing its value, smirk. The folly of wealth goes to his head. He forgets the Deku Tree, whom he must meet urgently. He forgets Navi, who begs him to continue his quest. Link continues to grab piles of grass, wanting to find other yellow creatures and kill them for their Gold Rupees.
Eventually, Link finds other creatures, but they look like rocks and throwing them to the ground doesn't kill them. The rock creatures, sensing that Link has killed one of their kind and intends to kill more, follow and attack him relentlessly. As Navi watches in horror, Link is killed before his quest has even begun.