What Luke Knows

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This topic is something that has been kind of unfolding over the last few weeks and, like many other topics, I have been unable to sort it out in my head enough to write it down. Many things feel too personal to write here...though you might think that's just nuts considering the deeply personal nature of what I have already written. Anyway, here is the first part and the next part will be my next post.
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Last monday Luke and I were driving in the car. We were going to Hannaford. He asked me "mommy, did daddy die at Hannaford?". My heart sunk just to hear those words--did daddy die-- out of his mouth. I just can't get used to that and I (literally) wince every time I hear it.
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Robin: "No Luke, why do you think that he died at Hannaford?"
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Luke: "Because of my dream. Daddy told me he went to Hannaford after he went to work".
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I thought about this for a minute because this is the second time Luke has referenced "his dream". The first time was back when I took him to the NASCAR qualifying thing, a few weeks ago. We were riding into the racetrack and he said:
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Luke: "Did daddy hit a dump truck?"
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Robin (completely dumbfounded): "A dump truck...well the truck was pulling a trailer Luke, and daddy hit the trailer. But yes, the truck pulling the trailer was a small dump truck. How did you know that?"
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Luke: "From my dream. I had a dream and daddy told me he hit a dump truck".
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I racked my brain trying to remember if I told Luke that the truck was a dump truck. I could not remember. Both times Luke quickly changed the subject when I asked him other questions about his dream. The second time, I pushed a little more and then he just said "I was just kidding, I didn't have a dream". I am pretty sure he just didn't want to/couldn't answer my questions. I have thought of this conversation several times since it happened, and I just kind of thought that he must have heard someone talking about the accident...though I know people are careful around him.
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I do not have any ideas or theories about what is going on with this. I am just documenting what he said and I think it's a little odd, and very interesting. Prior to these incidences, Luke has rarely mentioned the word "dream" to me, much less tell me anything that happened in one of his dreams.
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