The only thing that bothers me is why I never thought of it before.

6 seconds sound clip from the The Comedy of Terrors movie soundboard.

You can hear this line at 00:32:56 in the Blu-ray version of the movie.

Quote context

[...]

- To paraphrase the venerable adage, we shall kill two birds with one pillow.

- We just can't go on like this forever.

- Oh, nonsense. This is a sizeable community with more than an adequate supply of customers.

- Take Mr Black, for instance. He's a widower and therefore no risk of a mercenary widow bolting with the plunder of inheritance.

- And besides, with him, there's a double profit.

- The only thing that bothers me is why I never thought of it before.

- There must be a little more honest way to conduct a funeral business.

- I might expect that kind of talk from a criminal.

- Stop.

- Whoa! Whoa!

- Having a little trouble, Mr Gillie?

[...]