When water freezes before it solidifies
  We present a fluid dynamics video which illustrates a kinetic-dominated phase change just prior to solidification inception for a static drop situated on a cold solid substrate. This metastable stage initiated from solid-vapor-liquid interface and propagates through drop volume at much faster speeds than solidification growth stage. 
Faryar Tavakoli, Alen Sarkissians, Pirouz Kavehpour
physics.flu-dyn cond-mat.soft physics.chem-ph