chunk: Much to Jeff's amazement and admiration, Lisa then climbs the fire escape to Thorwald's apartment and clambers in through an open window. When Thorwald returns and grabs Lisa, Jeff calls the police, who arrive in time to save her by arresting her. Jeff sees Lisa has her hands behind her back, wiggling her finger with Mrs. Thorwald's wedding ring on it. Thorwald notices this, and realizing that she is signaling to someone, he sees Jeff across the courtyard.