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Say, we've barely touched on all the Time Travel tropes!
Like, how apparently hard it is to find a wormhole, but how apparently easy it is to accidentally open one up (like, with an experimental weapon explosion or a focused tachyon beam) and fall into it.
How time vortexes, when first opened, always initially go back to the past from the point of view of the people near the opening.
How time travelers can change the future catastrophically with their every move in the past, but can always set it right by a single, simple action that somehow erases all the other things they did. (A Sound Of Thunder notwithstanding)
How the Enterprise officers, on a Klingon Bird of Prey, could go into the past and change all kinds of things by their actions, then return to the future with a whale in the hold, interactions with engineers and naval security personnel and nothing had changed at all.
How Elaine Bains McFly, Biff Tannen and Spock are apparently the only ones who have ever met themselves in the past, putting to rest the theory that to do so would rupture the space-time continuum and destroy the universe.
How a Man of Steel could reverse time on a planet by the simple expedient of reversing its rotation (or did simply flying in circles real fast send him backwards in time?).
How time machines invariably have some part in their design that spins really fast.
How, when a time machine begins time travel, it is actually still there as it moves through the future, and those riding the machine can see things happening around them; but it has vanished from the perspective of outsiders and people and things can move through that spot as if nothing is there.
How time machines always keep the best time, their chronometers accurate within one minute every epoch.
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