Ok, here it goes....
I am a big fan of time travel movies. Except planet of the apes. That just confused me.
So, I spent a lot of time in my youth (like, two years, every day... almost all the time) contemplating the plausibility of time travel. I was (and still am) a strange child. Anyway, one of my favorite things was the grandfather paradox. I'm sure you've heard of it, but just in case, here it is: Grandfather Paradox
And I was thinking about stars, how the light takes a really long time to reach us, because they are so far away. So I was thinking, if you were able to go back in time, you would be seeing the light, and maybe the mass, of things that had happened in the past, not making them happen again with you there. That would involve bringing back the dead, or at least somehow bringing back their conscience. And so there would be no conscience behind the light, you would merely be seeing a 'movie' of your grandfather in the past.
This 'movie' would not be alive, so you couldn't kill it. shooting it would most likely have no affect other than to muddy up that exact moment in the past for the next guy who wanted to visit, by scattering some light particle/rays.
So Harry Potter and the Chamber of Secrets seems to be a more acurate time travel film than Back to the Future, at least to me.
And would you really want to kill your granddad?
Sorry if this is a bit incoherent, I think I may have a fever....
anyway, I hope you found this interesting, any thoughts?
-Andrea