
By magical circumstances - I found out that all the same, programmers like to play and do not hide their talents in cheating when creating services :) and implement various features on generally large resources. And in order to see features, they give preference to the great code (since the days of the battalion commander)
Konami Code . Learn more about what it is on the Wikipedia page -
here .
For example - on the same Facebook you can type the code on the page, for example writing a personal message - to see how the light reflections reflect on the screen beautifully. Somewhere, you can see that a circle drops from the logo, but somewhere a funny music begins to play and the background of the site changes almost to the beat.
And on
http://dancesportinfo.net , in general, you can play tetris without stopping from your favorite resource :)
')
There is a
site that has a couple of dozen of such sites using the well-known Konami Code. Address:
http://konamicodesites.com . True to see the list - you need to dial the actual code. So, sometimes you can have fun;)
Gee :)
jQuery.com also lit up
there , which can please.
There was already published an interesting article about the secret level -
http://habrahabr.ru/blogs/jquery/38705/ .