My experience of joining in this project was very interesting.  I have had similar experiences in the past when I joined with others.  The difference this time was that the sensations were mostly felt in my head.... I felt first a connection with something and that something grew larger and more intense.  I felt a large surge of energy moving through that I felt I needed to expand my own channels to make space.
Difficult to be articulate about this process, and I was aware of many others joining in at the same time.
Marilyn.