Time machine? I haven't invented any time machine.
6 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 00:49:38 in the Blu-ray version of the movie.
Quote context
[...]
- I came here in a time machine that you invented.
- Now, I need your help to get back to the year 1985.
- My God.
- Do you know what this means? Lt means that this damn thing doesn't work at all!
- Doc, you got to help me. You are the only one who knows how your time machine works.
- Time machine? I haven't invented any time machine.
- Okay. All right, I'll prove it to you.
- Look at my driver's license. Expires 1987.
- Look at my birthday, for crying out loud! I haven't even been born yet.
- And look at this picture. It's my brother, my sister and me.
- Look at her sweatshirt, Doc. Class of 1984?
[...]