Man was hit by a large rock while driving a car. Rock flew through the windshield and hit him to the front of his chest, fracturing the sternum. Troponin T was elevated at 22 on the first day. He was previously healthy, without any cardiac history, so the coronarography was not performed, only heart ultrasound, where no abnormalities were noticed. Troponin levels were diminishing afterwards, reaching Troponin I value of 0.184 on the 11th day. The patient did not experience arrhythmias, dyspnea, fatigue or any other possible heart related problems in the course of these days. For reasons not quite clear (maybe to be absolutely sure about the diagnosis), cardiac MRI was requested 2.5 months after the injury.