This Is Us: What That Intense Promo Could Mean For the Season 3 Finale

This is definitely the most confusing part about the promo: Rebecca gets into a car crash. Maybe that's why Jack shows up at the hospital! Since it's a flashback, we know she will be OK in the end, but it could have repercussions later on. Perhaps her car crash causes some sort of injury that will appear later in life. Remember how Rebecca tells Tess that she has chronic pain all the time? That could also be the reason everyone is going to visit her in the flash-forward.