If it feels like a twitch, it's probably a nerve making a muscle twitch..

The Hug feels (to me) like someone is pressing really hard on one side of my ribs. Or like I ate a lot of food and the food is trying to get out thru my ribcage...or like someone is tightening a belt around my ribcage, very tightly.

I've got the twitch in the back of my ribcage, probably because I've been up with insomnia all night, and I was playing Sims3 for waaaay too long tonight without getting up and moving around.

Now I've got a headache AND someone is tapping me on the back...and I'm really tired.