NodeJS Inheriting from EventEmmitter class

gistfile1.txt

var sys = require('sys'),
    events = require('events');

function Downloader() {
    if(false === (this instanceof Downloader)) {
        return new Downloader();
    }
    
    events.EventEmitter.call(this);
}
sys.inherits(Downloader, events.EventEmitter);

Downloader.prototype.download = function(episode) {
    var self = this;
    
    var statusMessage = 'Downloading: ' + episode;
    self.emit('status', statusMessage);    
    
    setTimeout(function() {
        var finishedMessage = 'Downloaded ' + episode;
        self.emit('finished', finishedMessage);
    }, 5000);    
}