Welcome to my latest experiment. This is the big one, the one I've been waiting for all my life.
6 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 00:19:24 in the Blu-ray version of the movie.
Quote context
[...]
- Einstein! Hey, Einstein, where's the doc, boy? Huh?
(MACHINE HUMMING, GATE UNLOCKING)
- Doc!
- Yeah.
- Welcome to my latest experiment. This is the big one, the one I've been waiting for all my life.
- Bear with me, Marty. All your questions will be answered.
- Roll tape and we'll proceed.
- Never mind that now. Never mind that now. Not now. Not now.
[...]