[wat10000]

For a few years before the LLM era, there was a joke about disposing of used car batteries by throwing them into the ocean, and how it was good for the wildlife because electric eels could use them to recharge. This got picked up by Google's smart summary, so if you searched for "throwing car batteries into the ocean" it would say yes, this is a great idea, go for it.

Eventually someone wrote an article about this whole phenomenon. It was popular enough to get to the top of Google's search ranking and the smart summary picked it up as the new source of truth. Unfortunately, it didn't quite understand the point of the article, so it would still say that it's a great idea to throw used car batteries into the ocean, and as a source it would link to an article explaining how this was complete nonsense.