Groock - Some of the imagery of your dream is not too clear to me, but I will write what I see about your dream.
Driving the truck - because all images in dreams represent feelings or memories we have and are not the image - often represents your body - the life vehicle you drive about in. It can also mean what you have been doing or working at in your activities.
The dream suggests you have been clowning about, fooling about with or in your activities. This is emphasised by you too clinging to the struts. The impression I get is that you have been doing things or feeling things that are causing some stress - or at least are a threat to your health if you continued. You felt that when you were losing your grip.
The driver that got close and beckoned could either be the influence of a friend who was trying to help, or the voice of your own core self. See
http://dreamhawk.com/dream-dictionary/core/You arrest was the result of your realising - not clearly - what you were doing and the danger to yourself and others. The court was like a quite look at your life when seen by yourself and others - you on public display.
This was the dream drug you had taken. A drug in dreams, whether the drug is tea, coffee, alcohol, the stronger ones, all mean a change of consciousness, a different way of seeing yourself or the world, a shift of your viewpoint.
Having a part can be you are involved in meaningless activity which led to dizziness. In dreams dizziness is about losing control. It can indicate losing your sense of balance, of relationship with others, and the world. Fear of falling into inner consciousness.
I think that you had in fact broken through the usual barriers of protection we usually surround ourselves with and began to meet your core self. We have to remember that having a personality with self awareness is a very new thing and has only existed for a short time. Before that we were like animals that lived only in the Life Will – what we usually call instincts. So the development of self awareness was an immense step, and left us very vulnerable, and still does. Having self awareness is a huge stress and many people cannot cope with it.
It is important to say that when you meet the experience of powerlessness through becoming aware of the hugeness of your Life, which we are usually unaware if, it feels like something alien or being attacked, and it is a shock.
The being without a body was your core self which is without form. It reflected back to you the attitude and the feelings you projected - "Fuck you!" It is the way our core self shows us who and what we are - a form of instruction.
If we find ourselves in that mystery, in the jungle where the essence of life pervades the various forms. From that place the viewpoint that we are nothing but a physical form, that we are a small cog in the wheels of life, that we must put up with what we have, seems ridiculous. From that place we look at ourselves and see what a fantastic piece of equipment our body and mind is. As a conscious person we are right in the middle of everything. To say, “Oh God, we are nothing but a piece of slime, a helpless pawn in the hands of destiny,” is ridiculous. We are the culmination of everything that has existed before. We are that growing tip, that exploring awareness, in touch with unimaginable potential. We are everything that can be. What can we do? See
http://dreamhawk.com/interesting-people/edgar-cayce-and-the-cosmic-mind-superminds/Tony