I don't get it, Doc. I mean, how can all this be happening? It's like we're in hell or something.

6 seconds sound clip from the Back to the Future Part II movie soundboard.

You can hear this line at 00:51:54.036 in the Blu-ray version of the movie.

Quote context

[...]

- I'm afraid it is happening, Marty. All of it.

- When I learned about your father, I figured you'd come here.

- Then you know what happened to him? Do you know what happened March 15, 1973?

- Yes, Marty. I know.

- I went to the public library to try to make sense out of all the madness.

- The place was boarded up, shut down, so I broke in and borrowed some newspapers.

- I don't get it, Doc. I mean, how can all this be happening? It's like we're in hell or something.

- No, it's Hill Valley. Although, I can't imagine hell being much worse.

- Oh, Einie. I'm sorry, boy.

- The lab is an awful, awful, awful, awful mess. Attaboy.

- Obviously, the time continuum has been disrupted, creating this new temporal event sequence resulting in this alternate reality.

[...]