Let's have some fun this week with something a bit less serious.
First press the following keys in order: E, G, G.
Woo hoo, you just used the Egg.js library!
As the name suggests, Egg.js is library for adding "Easter eggs" to a page.
Let's take a closer look at the example from this page.
var egg = new Egg();
egg.addCode("e,g,g", function() {
// show the rest of the page
}).listen();
No magic; you just define the trigger sequence and register a handler for it.
Having fun yet? Continue with the A, S, D or W key to see another example of Egg.js in action.