1.   The blades rotate inside a plastic cup, so the blender can even be used in nonstick kitchenware.

2.   A properly balanced blade will rotate to a horizontal position.

3.   New, improved blades rotate more soothingly, Isherwood said.

4.   The blades only rotate when the machine is moving forward, Willis says.

5.   The helicopter blades were still rotating, he said.

6.   The helicopter blades were still rotating as it descended, he said.