A hypnotist might turn you into a chicken or pull some other silly embarrassing tricks on you
A clinical hypnotherapist would never do this. This is confusing a stage hypnotist with a clinical hypnotherapist.
You must be weak minded if you can be hypnotised
Anyone who can understand simple instructions and concentrate adequately can be hypnotised.
You can get 'stuck' in hypnosis
This is simply not true. On rare occasions a subject may not come out of the trance straight away. This is usually because they are enjoying the relaxing state so much that they don’t want to come out.
You are not hypnotised if you can hear the hypnotist
This is also not true. Each person has a unique experience of hypnosis. Some people consciously hear the hypnotist, whereas others do not. This has no bearing on the success of the session whatsoever.
You can be made to reveal your deepest secrets when in a hypnotic trance
Since your mind is fully aware and awake during a hypnotic session this is not possible. If you really do not want to talk about something then you are under no compulsion to do so.