Right underneath my ribcage to the left side I have had this twitching going on for 2 days. It feels just like 7-8 mo. pregnancy kicks. I can't figure there being a large muscle there, it is quite noticable too, and of course I've watched too many psi-fi movies and started to think I had a mouse-size alien growing inside my intestine or something!! It is very intense twitches and not my imagination. What body parts are in this location that can twitch like this? Also, if it was upper colon, the twitching should be in a larger area than this one very specific location. Ahhh, I'm starting to think psi-fi again!!! It feels like muscle twitches you can get in the corner of an eye, quite annoying!