Such a brilliantly-delivered line, but I have a question. Was this Leland, the good father, shouting out at Bob? Of course, he wouldn't remember per what was revealed shortly before he died.

Yes, probably a plea to Bob, OR a plea to Laura to not take or take (whichever it was- it's been awhile ; ) the ring that made Leland have to go for it ??

just a suggestion. 

Just reading that line sends chills down my spine.

It's great written, it's great in the film and it's great in the trailer.