If their was a suit that was able to stay hot on the outside of it, and you had no choice but to jump off an airplace that was about to crash and you were flying over the ocean. Would you be safe to jump into the ocean without breaking anybones because this suit was able to stay hot. I think so. Because if you heat up a fluid it becomes less dense. Just say magically that this suit doesn't burn you when you put it on, but say it some how stays hot very hot on the surface of it. Ideally say that it doesn't change temperature while falling from a plane. I think you would be safe.