Films — Live-Action
Bruce Banner: Think about it. If you travel to the past, that past becomes your future. And your former present becomes the past. Which can't now be changed by your new future.
Scott Lang: So Back to the Future is a bunch of bullshit?!
Scott Lang: So Back to the Future is a bunch of bullshit?!
Gohan: So, wait... Trunks, I'm curious. If you came back in time again to help us, does that mean we already failed?
Trunks: Actually, 'turns out that's not how time travel works.
Krillin: So you're saying I can't just take your time machine, go back in time, and tell myself not to date Maron?
Trunks: I don't know who that is... but no, you couldn't. I mean, you could, but it wouldn't be the same you. You see, when I travel back to the past, I'm technically going to a different universe-
Gohan: Oh... you mean multiverse theory?
Trunks: ...Wait, what?
Gohan: Yeah, *cue Exposition Diagram* with every decision, it creates a branch in the timeline. Whenever you travel back in time, you're actually entering another parallel universe.
Trunks: ...How could you possibly-?!
Gohan: I've been studying theoretical physics, ...Although, at this point, I guess it's just physics.
[...]
Yamcha: I don't get it, if it doesn't affect your timeline, why even come back to ours and tell us anything in the first place?
Trunks: Well, besides wanting to make at least one timeline without the world being destroyed, my mother didn't tell me until after I'd already done it once.
Trunks: Actually, 'turns out that's not how time travel works.
Krillin: So you're saying I can't just take your time machine, go back in time, and tell myself not to date Maron?
Trunks: I don't know who that is... but no, you couldn't. I mean, you could, but it wouldn't be the same you. You see, when I travel back to the past, I'm technically going to a different universe-
Gohan: Oh... you mean multiverse theory?
Trunks: ...Wait, what?
Gohan: Yeah, *cue Exposition Diagram* with every decision, it creates a branch in the timeline. Whenever you travel back in time, you're actually entering another parallel universe.
Trunks: ...How could you possibly-?!
Gohan: I've been studying theoretical physics, ...Although, at this point, I guess it's just physics.
[...]
Yamcha: I don't get it, if it doesn't affect your timeline, why even come back to ours and tell us anything in the first place?
Trunks: Well, besides wanting to make at least one timeline without the world being destroyed, my mother didn't tell me until after I'd already done it once.
