As a retired fire investigator, "Old-Bisquit" has it right. When a fire is nipping at your butt and the temperatures are climbing, you're going to jump. I once had a case where a young woman was trapped in her fourth floor apartment building in West Hollywood and jumped to the roof of the adjacent two story apartment (8' away and 20' down). She broke pretty much everything from her waist down. She eventually recovered and survived the fire.
With that said, I've discussed it with my wife. I told her that I love her and I want her to go out the window first. She should then lay directly below the window, quietly listening for my directions. ;)