The Shadow's eyes saw the hand move to the switch.

A shift requires that the whole hand moves and results in a change of position.

She raised a phaser so quickly that I did not see her hand move.

He couldn't seem to remember how to make his hand move again.

I hadn't even seen her hand move but his left wrist was broken, dangling!

It took deliberate control to make his hand move in the direction that he wanted.

I saw the whiteness of his hand move again and the lights came up.

She saw his hand move and sucked in air to scream.

They didn't notice her right hand move beneath the covers.

Then - he saw her hand move, and she was gone.