If you say you have someone in the palm of your hand, it means you have total control over that person.
Elvis Presley was a great performer; he had the audience in the palm of his hand.
Joan knew all her neighbours' shameful secrets. She felt they were in the palm of her hand.
If you give someone a hand, it means you are helping that person.
I know how to operate this machine. Let me give you a hand.
King Kong has appeared in movies since 1933. The story of a giant gorilla on a lost island that falls in love with a blonde actress and later goes crazy in New York was remade in 1976 and 2005.