The straightforward answer is YES! Everyone experiences hypnosis be it he is willing or not; be it she knew it or not.
Sound scary? Actually it is not. Hypnosis occurs when we are focused on one task on hand, like admiring the beautiful nature or a project. It occurs when our mind gets bored and started drifting away (eg. daydreaming).
It occurs when we have a “lost of mind” and is not sure what we are doing – press the wrong floor button in the lift and ended going to the wrong floor.