Laravel事件：火灾有效载荷格式错误

I am currently using Laravel 4.2.

When I fire an Event sending the payload as array, listener retrieves the payload with it only being the first item in the associative array.

Firing the event:

$data = array('user' => $user, 'password_clear'  => $pass);
Event::fire('user.created', $data);

Listening like this:

Event::listen('user.created', function($data) {
    dd($data);
}

Dumps the following:

object(User)#809 (20) {
    ...
}

While I would have expected an array. Am I missing something?

Thanks, Federico