I had just read the topic about Australian drop bears, which I had never heard of, so I looked them up on Wikipedia. A related article was that about another fictitious creature, the hoop snake, which I had also never heard of. Since this article had no picture, I decided to search for it using Google to see what the creature supposedly looks like. All I type is 'H' and 'hoop snake' is the first search suggestion. I had never searched for a hoop snake before, and it is in no way the most commonly searched thing starting with H, which means Google had to have tracked my Wikipedia browsing session in order to have come up with that result.
