meeting yourself

Another way to understand is the idea of black holes.... they have such a huge gravitational pull that they even drag light into them. So if you watched someone falling into a blackhole, at some point the image you would have of them would be from the past, what could subjectively be called "time travel". But this only a loose definition.

Although you wouldn't have an "image" of them as that would require light being able to reach you as the observer, which it wouldn't.

It's all relative. 😉