var KoalaBear = Class.extends(Bear, {
		name: 'Koala Bear',
		color: 'grey',
		ragesAt: function(victim) {
			alert('The' + this.name + ' bitch-slaps ' + target');
		}
	});

	var koalaBear = Class.def(KoalaBear);

	koalaBear.ragesAt('Eric');