Thanks for the replies.
Afterwards when we (me & my client) talked about it, we came to the conclusion of it being a release of stress or illness or something that was in her. I was told before that when we detox - it comes out of our feet- we were thinking this time it came out of her ears.
She gave me this mental picture to describe what it was like. On the cartoons when the character is steaming mad or something like that- steam comes flying out of both of the characters ears.. that's what it was like to her. no pain or anything.
Reiki is truly the best- I'm so excited to be learning/using it! Is so AMAZING!!!