This description of a massive heart opening by Bright Star gives us an idea of what to expect. You can read the full account in a book by Steve Beckow, linked at end.
‘I was in my office, sitting at my computer, when I felt the energy rising: Firstly, I felt a prickling in my legs, which went up over my back along the spine up to my forehead. It was very pleasant and I relaxed. Suddenly, my root chakra opened up and the energy flowed from there to every chakra in my body, connecting all of them and let them pulsate.
I felt every atom of my body, was connected with everything that is, was melting with the Universe. I was part of All That Is. At this moment, I felt a bit dizzy but the feeling was so very comfortable that I just let the process flow and did not have any concerns. Until the next thing happened…
Suddenly, my heart opened up and by this, I mean it was like my heart explodes. My heart was flooded with an immense wave of light, a golden bright light that I can simply not describe. But I’ll try my best to do it nonetheless.
I instantly felt that now, the Tsunami of Love hits my heart and firstly, I was so concerned about this strong feeling in my heart, that I thought I am having a heart attack.
The Tsunami of Love hit me so hard that in the same second, all my concerns, anger, distress, hate and all other unpleasant feelings, which bothered me for such a very long time, were washed away completely.
All these feelings were replaced by pure Love and for the first time ever in my 45 years, I experienced Love in its purest form. The Tsunami of Love was a complete cleaning of my “system.” A resetting of my being. After an hour or so, The Tsunami of Love levelled out, leaving me in total peace and Love.