
Well, first of all it wasn't a trick, it wasn't magic and it wasn't an illusion.
Basically a number of things happened to those people ( a small percentage of people that were watching) that were apparently stuck to their seat.
Throughout the show, those people that are generally suggestible to instructions from authority figures were being primed to follow Derren's instructions to remain stuck in their seat. The whole show built up the tension and expectation for these people. Derren did other tasks on the show (the begger, the toy shop) which acted as "convincers" to these suggestible people that he can control them at a subconscious level.
Then just prior to the "subliminal film" being shown Derren commanded that you will be stuck to your seat with various words and phrases. This would have been the final thing those suggestible people would have needed to give them the belief that they were about to become stuck. The film shown is basically irrelevant and all that does is focus your mind and at the same time help you relax to get into that state of not being able to move.
Derren talks about PWA, which is Perception Without Awareness and this was used and is a common theory.
Many ESP-like experiences could be due to perception without awareness. Perception without awareness occurs under the following conditions:
A stimulus is present in the environment, strong enough so that a person could perceive it if attention was drawn to it.
The person does not pay attention to the stimulus and does not remember it later. However, the stimulus affects the person's behavior or thought process.
Suppose you are singing a popular song. You go out of the room for a minute, and then you come back in and start singing it again. Your friend says, "Hey, I was just thinking of that song!" No doubt your friend heard you singing it a few moments earlier, but if your friend might remember this. It seems like an amazing coincidence or ESP: "We were both thinking of the same song."
What is the difference between subliminal perception and perception without awareness?
Unlike subliminal perception perception without awareness involves a stimulus that is possible to perceive if a person tries to see it. The perception takes place outside of attention and remains unnoticed. Such unnoticed stimuli can easily affect behavior.
So, what really happened? Those people that were stuck were subconsciously primed by Derren throughout the show. His reputation as a mind reader, hypnotist, illusionist, magician, psychic or whatever further convinced these people to believe that they would become stuck. We all follow instructions from someone we respect and admire - even at a conscious level. The film then made people focus and relax - into a hypnotic state. And DA DA!
For those millions and millions of people that didn't become stuck are either not particularly suggestible, do not respect authority, were not relaxed, were scared of Derren's powers, hate to be controlled or just bored with the whole show. Or maybe a combination of these factors.
Gavin www.mindsionline.com