Your brain doesn’t really understand what’s going on and it just runs off fuzzy logic developed over thousands of years before modern technology
For most of human existence, dizziness and a strange feeling in the stomach meant you ate something bad. When the poison alarm sounds your brain purges the system to try to get anything out that hasn’t already been absorbed
Unfortunately we now have ways of making you disoriented and sloshing up your stomach that don’t require eating the wrong mushroom, but your brain didn’t develop with rough seas and carnival rides so when the tilt-a-whirl gets going your brain goes POISON!!!! because it doesn’t know any better
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