Hypnosis Can You Be Hypnotized?

This video demonstrates a quick and simple hypnotic convincer to show how susceptible to hypnosis some people are. Michael Watson discusses hypnosis and embedded commands with a small group.

He has them pretend they are holding a balloon in one hand, and a heavy bucket in the other. Those whose hands rise when they imagine they are holding a balloon, and fall when they imagine when they are holding a bucket are the most susceptible to being hypnotized.

Is it possible to be hypnotized against your will? What are some of the criterion on the Stanford Hypnotic Susceptibility Scale?