Reasoning: A young man came out of the river and asked an old man by the river if there were any aquatic plants in the water. The old man said no, so the young man jumped into the river and committed

Reasoning: A young man came out of the river and asked an old man by the river if there were any aquatic plants in the water. The old man said no, so the young man jumped into the river and committed suicide. Why? The young man's girlfriend fell into the water, and the young man jumped into the water to save him, but he couldn't find his girlfriend. Suddenly, he was caught by a group of aquatic plants, and he struggled out. After climbing ashore, he heard the old man's words. He knew that it was his girlfriend he broke free from. He regretted it very much, because he thought he killed his girlfriend, so he blamed himself too much and committed suicide!