|Who wouldn't want to make their computer screen "do a barrel roll"?|
Barrel rolls aren't the only easter eggs on Google—if you type in "askew" or "tilt", the whole screen will do so. If you search for "anagram," it'll show "Did you mean: nag a ram." If you search for "recursion," it'll ask "Did you mean: recursion." If you type in "Google gravity," and then hit "I'm feeling lucky," the screen will literally fall to the bottom due to a "lack of gravity." If you type in "Google Pig Latin" and hit "I'm feeling lucky," guess what happens?
You can see a full list of the easter eggs here (and some screenshots of some here), including the Google Feed Ninja, Douglas Adams calculator references, and the hidden flight simulator feature in Google Earth. Unfortunately for Pro-Googlers, none of this will make the loss of the + operator, a standard bit of syntax used to force words and phrases to appear in search results, any easier to swallow.