That's the thing.

[keannu]

A bride is being haunted by a ghost before her wedding, and she confesses weird things happening and in the middle of it, she says "That's the thing". Is it like "the thing is..." or "but I'd like to contradict something..."? What does it usually mean?

g.w
bride- electrical things. lights are flicking all the time. Computers go crazy
Mel- And what about you? what do you feel?
bride- That's the thing. Sometimes i feel really tired. drained

[5jj]

It means something like, "Ah, you have mentioned something that is troubling me"