Nematic bubbles form in smectic freely suspended liquid crystal films when they are heated well above the bulk smectic to nematic transition temperature. In thin films, nematic droplets form and cause rapid film rupture. In some films, individual layers are seen to sweep off the surface, depending on the temperature, the thickness and the substrate. In thick films, these droplets occasionally remain stable for long periods. The shape of the droplets (in plane and perpendicular to the plane) allows determination of the local surface tension. A variety of dynamics are seen as a precursor to film rupture. Occasionally, isotropic regions are seen to form on these thick films before they rupture.