Samprajnata Samadhi or Savikalpa samadhi: Savitarka, with doubt or conjecture; Savichara, with reasoning or pondering; sananda, with joy; and sasmita, with I-ness or individuality.
Many TM'ers may experience 'jada samadhi' which I believe is commonly referred to as 'blacking out', (in the early days). Maharishi Patanjali calls this 'samadhi' useless as it does not infuse being.
