No, it's all right. I've got to tell it now while I still remember it.
6 seconds sound clip from the The Time Machine (1960) movie soundboard.
You can hear this line at 00:06:19 in the Blu-ray version of the movie.
Quote context
[...]
- A drink.
- Well, can't you speak, man? What happened to you?
- No, it's all right. I've got to tell it now while I still remember it.
- Relax. Try to relax. You've all the time in the world.
- You're right, David. That's exactly what I have. All the time in the world.
- Ever since we were together five days ago, the last day of 1899.
- There in that box rests the result of two years' labor.
- I wanted to finish the job before the new century began. I barely made it.
[...]

 Dead of Night (1945)
 Dead of Night (1945)  Phantom of the Opera (1943)
 Phantom of the Opera (1943)  Scooby-Doo, Where Are You! (1969)
 Scooby-Doo, Where Are You! (1969)  Halloween III: Season of the Witch (1982)
 Halloween III: Season of the Witch (1982)  Knight Rider (1982)
 Knight Rider (1982)