And I'll tell you something. If I knew then what I know now, I wouldn't have had my little accident.

8 seconds sound clip from the Beetlejuice movie soundboard.

You can hear this line at 00:32:23 in the Blu-ray version of the movie.

Quote context

[...]

- Adam, is this what happens when you die?

- This is what happens when you die.

- That is what happens when he dies.

- And that is what happens when they die.

- It's all very personal.

- And I'll tell you something. If I knew then what I know now, I wouldn't have had my little accident.

(CHUCKLING)

- Maitland. Party of two.

- Take the handbook and go to the sixth door.

- Oh, we forgot our handbook.

[...]