Menu callback that returns two instances of the node form.
function form_test_two_instances() {
global $user;
$node1 = entity_create('node', array(
'uid' => $user->uid,
'name' => isset($user->name) ? $user->name : '',
'type' => 'page',
'langcode' => Language::LANGCODE_NOT_SPECIFIED,
));
$node2 = clone $node1;
$return['node_form_1'] = entity_get_form($node1);
$return['node_form_2'] = entity_get_form($node2);
return $return;
}