Bladder explosions are a rare complication of endoscopic surgery caused by massive cellular hydrolysis during electrocoagulation, releasing a mixture of gases that becomes explosive in contact with oxygen. Oxygen may enter the bladder as a result of manipulation of the resector, incorrect use of the Ellick evacuator bulb or introduction of air bubbles via the irrigation tubing. This risk can therefore be limited by taking certain precautions. The authors report a new case of intraperitoneal bladder rupture during transurethral resection of the prostate.