If you are experiencing any involuntary movements in meditation such as moving the hands or head or moving legs etc. it means your kundlaini is invoked and it is demanding you to take up self realization path to know who you are, your purpose of life and connecting you to the purpose of life in terms of karma. This way you will start burning your obligated karmas and get rid of new karmas as well.
You also have a ray of light in you, which is called GANA / AMSHA in sanskrit. Example you could be a ray of Sun or you could be ray of a some angel or you can be a ray of a devi or devata irrespective of your religions.
Whose kundalini is invoked, such people belong to Manthan Kundalini Kriya Yoga which gives you fastest way of self realization and to evolve your soul much faster unlike any other kriya yogas on the earth.
This path is all about seriously working towards self realization, for your soul evolution by leaving your attachments, closely working with the Guru of this path.
If you are interested in lessons, you can take up life time lessons and you can signup here