That is common with some people, not so much with others. We`re all seeing a spectrum of effects and you don`t get to pick and choose which ones apply to you. For what it`s worth, the first BS I ate gave me stomach cramps for 90 minutes that started abut 45 minutes after I ate it. Once they were gone, I had no other problems.
I think we all strive to eat/drink something before eating a super hot pepper in an attempt to lesson stomach issues.
You will fine VERY few (if any) that are hotter than the Brain Strains from Jamie.
The first brain strain I tried, I brought to work, cut it up into ~1/8s, tried one piece on a pizza, then ate another by itself w/some salt. Immediate effects were pretty funny, flop sweat and uncontrollable tears just pouring down my face. Then about 30 minutes later, pain in the gut that penetrated all the way to my back, lasted about ten minutes. That was also my first superhot.