You are probably familiar with the Darude-Sandstorm thing, right?
Well, for April Fools, if you type in anything, like"nerdcubed" or "Nyan Cat 10 Hours", it will say at the top, "Did you mean, Darude-Sandstorm?" Oddly enough, if you type in "NO", it will not suggest the song. Clever me! Nobody else posted a comment on the NO feature.