EE WAS OPERATING CRANE. THE FORM WAS IN THE CONCRETE IN THE COLLAR. HE WAS TRYING TO MOVE THE FORM TO THE BOTTOM. THE FORM WAS TIGHT IN THE CONCRETE & WOULD MOVE ABOUT 12"" TO 18"" & THE CRANE W OULD TAKE THE WEIGHT OF THE LOAD. THE AUDIBLE & VISUAL ALARMS WOULD GO OFF. THIS HAPPENED SEVERAL TIMES BEFORE THE FORM MOVED OUT OF THE CONCRETE COLLAR. CRANE HAD A FULL LOAD & TURNED OVER.