I get the roving flutters in my abdominal area just like I will get in my legs and arms sometimes. It DOES feel like there's something trying to get out when it's particularly strong! I can watch them and feel them with my hand, and even better, so can the old man...

It freaks him out!
I just figure they are spasms. They come and go wherever they are emanating at the time and then they go away. They aren't painful, just weird.