Dear Maeght,
I am not describing anything deep here, or supernatural, just an OH!! moment, a two minds thinking alike moment, the sharing is the connection, you mentioned that there needs to be a link, an exchange, there was, three big daft stupid grins for one.
What about, we were in harmony, what about our celtic souls connected to the music, what about the spirit moved us, I had two large bells if I remember correctly.
Gonnagle.