Google with love....

sqrt(cos(x))*cos(300x)+sqrt(abs(x))-0.7)*(4-x*x)^0.01, sqrt(6-x^2), -sqrt(6-x^2) from -4.5 to 4.5
Type this into Google search last Tuesday and you'd be in for a little Valentine's day surprise.
It's hardly a formula I'd have stumbled across by accident, so thanks to mashable.com for bringing it to my attention and reminding me of some other classics at the same time. Like 'Let it snow' which ended up immersing my entire screen in snow and ice. 
Or try typing 'askew' and see what happens.
Or search for Chuck Norris and hit I'm feeling lucky.
That last one puts me in mind of Siri, the jolly polite manservant who lives inside my phone.  If you've a G4S try asking him a knock knock joke and see where it gets you.
Which brings me to the point of all this - which is what is the point?  Whilst a lot of the time these little 'Easter eggs' or tricks are put there to engage Google's audience, very often these are snuck in by individual coders with no obvious end benefit for anyone other than to give us all a little chuckle and a sense of being 'in the know'.  
I love it that people beaver away, spending time doing this just because they can. You know, that's absolutely alright by me.