Hi everyone,
I would like to share with you my experience with what maybe can be called raising of kundalini.
First time it happened to me when I was about 15 years old - I went with my mum for a session of "sahaja yoga", which is basically about raising kundalini.
We tried a simple meditation there, with eyes closed, it was something like, now put your right hand on your stomach and think of (I don' t remember what), now put your hand on your heart and try to forgive everyone (in general, not thinking about a special person)...this kind of meditation. I was doing all of this; i was concentrated but not 'pushing' too much as I was at the same time trying not to laugh because my mum found all of this funny. In the end we were asked to put our hand 10 cm above our heads, and we were told that we should feel something, a kind of cold or warm energy, something like that. I remember that when I put my hand above my head, I felt a force similar to the force between two magnets of the same pole, it was so strong that I had to completely raise my arm and this "force" was still continuing above my raised arm. I think it was kundalini that I managed to rise as this was the purpose of this meditation. However, when I tried this meditation some 5 years later, it did not work.
Many years later (a few months ago) I managed to raise kundalini energy again without even planning to. I was at work and I had nothing to do, so I decided to write a letter to God:) So I was sitting at my desk and typing text, in which I was asking God al the existential questions for which I don' t have an answer. After some time I started just to talk aboud God how I would like to love him and I got quite emotional when writing it (I am sorrry I know it sounds very stupid when I write it on a forum as it is something very personal). After some time I realised that I was sitting with a spine very straight and my face was very relaxed and I felt the same kind of energy as I experienced during my sahaja yoga meditation. I was very surprised as this was not at all my intention, I was thinking what I should do know, shoud I use this energy to heal my thyroid gland?

All this experience lasted about half an hour, after my colleagues started talking to me and it disappeared. But since then I felt a weird sound in my ears that I hear sometimes but this times it was quite loud and it disappeare only after a qi-gong class that I had a few days later.
So what I think had happened is that I have, without wanting to, activated during my "prayer" this special energy, but obviosly it wasn' t the best and safest way, because of the sound I heard in my ears. And it went away only after a qi gong class where probably my energies were put into balance again. So I decided that if one day I want to try raising of kundalini, I will try it with some yoga techniques.
So I think, there are many techniques for rising kundalini, but not all of them are safe. I also think that this energy can be raised without doing any special effort, just by living your life...