Amateur Philosophy Hour returns

I see that Hollywood recently relased a new installment in the "Final Destination" series.... I can't say that I've ever had the pleasure of sitting through the entire length of any of those movies, but a few months ago, I was flipping channels on tv and stumbled across the beginning of Part 2. The story featured a young lady who was troubled by premonitions. She'd see a vision of some huge mass fatality accident, like a plane crash or a freeway pileup, and then would take action to prevent it from happening. The catch was: those who were "scheduled" to die in her premonition (but didn't due to her intervention), quickly found themselves on the receiving end of some bizarre (and equally fatal) freak accidents. One such instance -- a fairly spectacular one -- involved a guy who ineptly started an apartment fire in his kitchen, but somehow managed to escape from the building... only to be impaled in the head by a falling fire escape ladder! Fun stuff!

The protagonist struggled with such issues as: can you truly prevent a death that some higher power intends to occur? Obviously not, because these folks were dying just the same. Of course, I don't claim to have the answers to such deeply philosophical questions... but I did start wondering about whether there might be such a thing as reverse premonitions. For example, if I have a vision of myself breaking my leg on a ski trip, and then it doesn't happen, is this a reverse premonition? And furthermore, did the vision prevent the accident from occuring? (I.e., if I had not envisioned the possibility, would I have broken the leg? Welcome to the world of possibilities my mind entertains when I'm in the middle of a 25-mile bike ride.