Edit in JSFiddle

//extend the A object with Backbone.Events methods
var A = _.extend({name:'A'}, Backbone.Events);

A.on('say', function (options) {
    console.log(options[0]);
    console.log(options[1]); 
});

//trigger say event on A, passing the callback function two strings in an array
A.trigger('say', ['Hello','Good Bye']);