No, we do not dump, as in get that same type of "feeling" that RNYers do by eating stuff the pouch doesn't like, such as sugar. However, over the last several months - and especially in most of January and part of February, I was experiencing something similar and it freaked me out a bit til I realized what it was.
I would eat something, and within about 1/2 hour, I would feel like a 15 lb cat was sitting on my chest, and another on my back between my shoulder blades (they're apparently very nimble imaginary cats). First, I would feel uncomfortable, as if I were needing a back rub - just a burning in between the shoulder blades. Then, I'd feel as if my sternum, just at the bottom center of my rib cage, was under pressure, too, until I was so uncomfortable I had to get up and pace. Sometimes walking it off seemed to help. Sometimes a cup of hot tea, slowly sipped. But usually, it just hurt - then I'd get the VSG version of the "foamies", which was just excessive mouth watering.
The second time I felt this, I went to the bathroom because I felt nauseous. I threw up (not much, but heaved a bit), and within 10 minutes to 1/2 hour, felt infinitely better.
I feared an ulcer, because of the painful feeling, and it seemed that this happened often after eating something acidic like tomatoes. But then it happened after having a flour tortilla. I've discovered in the last month that I can only eat a low carb whole grain tortilla - refined flour in anything gums up and gets stuck in my stomach, giving me the "cat on the chest" feel.
I got nervous - I don't have insurance right now, and can't afford to go to a doctor to check my stomach. However, I'm pretty positive it is not an ulcer. I started reading MacMadame's running/biking blog (fattyfightsback.blogspot.com) and she said the same thing happened to her after...ready for this?....after she either ate too much or too fast.
7 months out and I'm just now figuring out I'm still eating too fast or too much? DOH! Anyhow, since I've started paying attention again, I'm eating very slowly again, and paying attention to my feeling of full instead of wolfing something down. I also was taking a generic version of Prilosec (the walmart equate brand) - it was NOT working as well. I've started taking real Prilosec again - haven't had a problem since.
Learn something new every day