CLI App that gives an infinite loop

gistfile1.txt

<?php
define( '_JEXEC', 1 );
define('JPATH_BASE', dirname(__FILE__));

require_once ( JPATH_BASE.'/libraries/import.php' );
jimport( 'joomla.application.cli' );

class JoomlaRocks extends JCli
{
 
public function execute( )
    {
       $this->out( '   .           .     .__       |      | ' );
       $this->out( '   | _  _ ._ _ | _.  [__) _  _.|_/ __ | ' );
       $this->out( '\__|(_)(_)[ | )|(_]  |  \(_)(_.| \_)  * ' );
$error = JError::raiseError(500, JText::sprintf('JLIB_APPLICATION_ERROR_APPLICATION_LOAD', $client));
				return $error;
    }
}
 
JCli::getInstance( 'JoomlaRocks' )->execute( );