In my case, bad things and stuff happen inside the dream, although i don't know the cause until it happen IRL, but i do dream about it aftermath, and damn it sure hurt. The recent Dejavu is whem i got hit by a car, and the aftermath is i sit in hospital for 3 weeks, and it happen 2 months ago. Sure sometime it's scary that you know it's gonna happen, and yet you're powerless to change it.... and i lost my part-time job because of it.
Makes me remember that one university student who had a case of chronic deja vu, and it drove him crazy. He just constantly felt like he knew what was about to happen (he didn't though).
Which is why I personally believe in that interpretation, but that doesn't get rid of the existential angst it causes I have tried, but the problem is that (for me at least) it's very rarely more than like 10-15 seconds, which causes me to only really have time to stop up and feel freaked out, and watch the things progress, before it's done. So I never really have time to do so, once though I did try, and it felt hecka weird, it felt like what I did was wrong somehow, not sure why, but it did :s
Yeah, I can understand that (the existential angst and the freezing). I used to freeze because I thought there must be a reason for dejavu's and that maybe it was some kind of warning and something bad was about to happen (before I realized they're just random and unimportant). Maybe that's why I've never felt bad when I started trying to change things, more like relieved. Also, it would make me feel like I was reinforcing the idea that I've got free will to myself. Well, it's an interesting but pretty useless thing. I wonder if we'll ever get a completely satisfactory explanation for why/how this stuff happens.
I can make an example of this case. When the dream / dejavu wasn't man made, it's gonna be the possibility of future. Cuz i have a lot of experience with following the dejavu or breaking it -,-)
If I do have a strong sense of having deja-vu it's when I fap. I don't know if I did fap or not one thing for sure is that I did fap and at the same time I don't know if I did fap.