When the farmer went down to the water, he stepped into the lake, but before he could get a leg into the water, he was shocked, but before he could be electrocuted any further, he pulled his leg out of the water, and was lying on the cold, hard ground.
And yet, the farmer came back the next day. But this time, Zeus was angry, no, he was furious. he turned the water back to normal, but only to trap the farmer.
Zeus was sick of the farmer disobeying him, so Zeus had planned to electrocute the farmer before he could kill any eels. Zeus did not plan for his demise, but things don't always go as planned.
The eels were smart, when the farmer went down to the lake, the farmer had carefully tested out the water, it was safe, or so he thought. As he got deeper into the water, he couldn't find any eels. Then, all of a sudden, a bolt of electricity went through the farmer, and he just floated there.
When Zeus looked down at the farmer, he was dead. But not by him, he hadn't even electrocuted him yet, no this was by the eels. They had all went below the surface of the water, by his feet, and killed him.
If the farmer had stopped killing snakes, and listened to Zeus, then he would have lived, and died as an old man, happy, unlike how he did die, in pain, alone, and and mad. So listen, and follow the rules. Be careful what you do in life, because it might come back negatively.