This morning, while waiting for the train, I developed a sudden stomach ache that rapidly evolved into feeling like I'd been punched in the gut, complete with painful, tense muscles all around my abdomen, and difficulty breathing and all the other unpleasant feelings associated with that. I sat down to try to catch my breath and figure out what to do, and after a few minutes, it subsided, and I was back to feeling basically fine. WTF, body?
Is this a thing that happens? Does it have a name?