So I typed ggooooggllee.com [site abuses browser, unlinked -Philipp] in to see what website was there and was presented with "Foolgle", curious I searched on it for "hi" and a link to a yahoo search for gambling and porn came up! There are more funny jokes like that, depending on the keyword. I am guessing this one is to do with the fact that searching for hi on Y!Images brings up nudity/porn. Also, clicking the I'm feeling luck button is hilarious, so I won't spoil it here.

James, this is bad
you should put in the spoiler here to avoid trouble to others

DONT try "I'm feeling lucky", it just says "you felt wrong" or something like that & start opening pop-up in infinite loop. Popup blocker of my FF is working but still it throws popups & nearly halts your process.

IE on the other hand stops the popups after 1 attempt

It's not infinite! It stops when your screen is filled with little yahoo, dogpile, exite etc. searches for "search engine"