Many people think that hypnosis is like what you see in movies and TV shows and on stage. It appears as if someone can magically take control of your mind in order to make you do things against your will.
In reality, hypnosis is a natural, normal state of mind, one that you've experienced whether you're aware of it or not. Being in hypnosis means that you're in your alpha brainwave state. Wide awake, you're in your beta brainwave state. Sound asleep, you're in the delta state.