A 64-year-old man with poorly controlled hypertension and long-term smoking presented after a sudden, brief loss of consciousness triggered by laughter. Episodes were identical to two previous events years earlier. He experienced no prodromes, chest pain, palpitations, or dyspnea, and recovered fully within seconds. Examination and initial tests, including ECG, labs, and chest X-ray, were normal. The clinical picture suggested situational syncope, potentially laughter-induced (“gelastic syncope”), but cardiac causes required exclusion due to age and risk factors.Assessment included detailed history, physical examination, and initial cardiovascular and neurological screening. Differential diagnoses considered reflex syncope, Valsalva-related situational syncope, arrhythmias, carotid sinus hypersensitivity, cataplexy, orthostatic hypotension, neurological disorders, and structural heart disease. Further recommended evaluations included Holter monitoring or event recording, echocardiography, and monitored carotid sinus massage, with consideration of tilt-table testing.Laughter-induced syncope is an uncommon and often underrecognized entity within situational reflex syncope. Its reproducible emotional trigger, absence of prodromes, and abrupt onset make it a distinct clinical presentation, easily confused with neurological or cardiac disorders. This case highlights a rare but benign mechanism that contrasts with more typical vasovagal pathways.This case demonstrates the importance of exploring situational triggers when evaluating transient loss of consciousness. Laughter can mimic a brief Valsalva maneuver, decreasing venous return and cerebral perfusion. Although reflex syncope is generally benign, older patients with cardiovascular risk factors warrant a systematic cardiac workup to rule out arrhythmogenic or structural disease. Increased awareness of laughter-induced syncope may prevent unnecessary investigations and reduce diagnostic uncertainty. Future research could clarify its prevalence and assess whether specific patient profiles—such as those with autonomic hypersensitivity—are predisposed.Laughter-induced syncope illustrates how everyday actions can provoke unexpected physiological responses. Recognizing emotional triggers enables clinicians to balance reassurance with targeted evaluation, avoiding misdiagnosis and unnecessary interventions.The patient’s presentation is most consistent with laughter-induced situational syncope, a rare form of reflex syncope. Despite its benign nature, appropriate cardiovascular evaluation remains essential in older individuals. Recognizing such unusual triggers helps refine diagnostic accuracy and supports personalized patient counseling