...The fact is that Dale and Grady had made a pact long before they ever came into this earthly existence. This is why so often there is one physical death that follows another. They are from the same soul family. They are so intertwined that they need to leave together. They are all returning home together.
Sometimes, though, you make a pact with yourself. I'll pretend there's nothing wrong if you pretend there's nothing wrong. It's called denial, and it's one of the strongest pacts in the world. Just ask all those people who were still drinking champagne while the Titanic went down.