I happened to notice when I was laying on my couch and shirtless my stomack twitched. I dont at all feel any pulsating sensation whatsoever from the twitching but it is noticable when sitting or laying. It isnt very noticable unless youre looking for it and Ive looked it mirrors it isnt noticable enough to appear in them. I wouldnt have even known other wise had I not happened to see it but I still am just a little curious as to what it may be. Also, the twitching is very rythmic, kind of like the a heart beat. Could be normal and I just never noticed it before. Anyone who has any idea whatsoever about what could be causing it, your responses are appreciated.