Leander Koch, a pilot of Austrian flight company Knaus Helicopter, demonstrates the mechanical (left hand) and electrical (right hand) hook release systems on a SA 315B Lama helicopter in Karres in Austria's western province of Tyrol September 7, 2005. Nine people were killed when a helicopter of the same type dropped a concrete block on a ski-lift near Soelden on Monday, plunging a cable car cabin filled with tourists down the mountainside in the Austrian alps. REUTERS/Dominic Ebenbichler HPB/CVI