When you take shrooms (magic mushrooms), one of the common symptoms you may experience is dilated pupils. Psilocybin, the active ingredient in magic mushrooms, can cause the muscles in the iris to relax, leading to dilation of the pupils. This is a common physiological response to hallucinogenic substances and can occur within 30-60 minutes after ingestion. Other symptoms that may be experienced with shroom use include altered perception, hallucinations, changes in mood, increased heart rate, and changes in body temperature. However, the given options of "Enlarged 'Private Body parts'", Cancer, Cardiac Arrest, and Stroke are not typically associated with shroom use.