If you eat certain kinds of tropical fish, you can have a great high. It's like the old saying goes, "teach a man to fish, and he will forget his own name." Or, you can get serious nightmares, it's kind of a coin flip, from what we've found.
Here's a report of what happens when someone eats the "dream fish" near Norfolk Island:
The inhabitants stated consuming this fish would produce nightmares. In order to test this claim, Joe Roberts, National Geographic photographer, consumed some of the fish, broiled. The next morning he reported "It was pure science fiction." He saw a new kind of car, pictures of monuments to mark man's first trip into space. The fish is Kyphosus fuscus, closely related to the silver drummer caught off New South Wales. The author, roughly, also tried the fish and had weird dreams.'
We're not sure if the person who wrote this was bad at English or just tripping fish, but either way this sounds like a great way to eat healthy. Or a horrible way... Again, coin flip.