What do cardiology fellows and medical students to for fun? Heck, just throw the medical student in the MRI to look at his heart!
Addendum: If you look closely, you can see a small central jet of tricuspid insufficiency during systole. (The tricuspid valve is the valve between the upper atrial chamber and the lower ventricular chamber on the left side of the movie. The dark flow of tricuspid insifficiency backward from the ventricle to the atrium is clearly seen. A small amount of this leakage is typically seen in normal hearts and is used to estimate the person's right heart pressures on echocardiography using the continuity equation.)