buzz__decode on Instagram: "The post features a viral TikTok clip of a Japanese man in a car biting into a massive frozen popsicle in one go, immediately convulsing in agony from severe brain freeze, emphasizing the risks of hasty indulgence. Scientifically termed sphenopalatine ganglioneuralgia, brain freeze triggers when cold contacts the palate, causing rapid blood vessel dilation and trigeminal nerve activation, leading to referred head pain lasting 10-30 seconds per Cleveland Clinic and Joh