working graveyard shift one winter at the Sweetgrass, MT port of entry in the late 90's we had temperatures -38 below and we tested the myth that you could toss a cup of hot coffee up in the air and it would freeze before it hit the ground. It did. It would even make a cracking sound as it froze into little tiny coffee colored pellets.
Second part of the myth was you could toss a glass of room temperature water and it would not freeze until hit ground. That's what happen.
Has something to do with the greater molecular activity of a heated liquid freezing faster than a low activity room temperature liquid. Way beyond my knowledge of physics and science.