When I was early out, I could feel my pouch ball up and cramp when I would dump on my liquid pain meds. Now, it doesn't happen often. It doesn't happen when I dump now (although I don't dump often anymore because I know what causes it -- knock on wood) but it has happened a couple of times recently when I have been EXTREMELY stressed out. Yep, I would describe it as cramping or "balling up". When it happens, I actually visualize it...in my mind, it looks like a hard, angry peach pit.
What I am describing here is a completely different feeling than what happens when food is stuck...that feels like I would imagine a heart attack would feel like.