M-hm. Ah-ha. Look at that stalagmite.

6 seconds sound clip from the The Little Shop of Horrors (1960) movie soundboard.

You can hear this line at 00:33:34.720 in the Blu-ray version of the movie.

Quote context

[...]

- So, you are the young man who ruined my gladiolas, huh? Sit down. Come on.

- Guess what? My tooth stopped hurting.

- Yes, I know.

- Let's see. Shut up and open up. Uh-huh. Ah.

- Argh!

- Does that hurt?

- Yeah!

- Good. You haven't felt anything yet. Ah-ha.

- It's this one over here.

- Who is the dentist here, you or me? I'll find that tooth.

- M-hm. Ah-ha. Look at that stalagmite.

- But don't worry. It's going to be an easy one, Seymour. I won't even use Novocaine.

- Ow, you poked the mirror in my mouth.

- Well, don't tell me about it, stupid. Just swallow it.

- Alright. Here's the thing now, Seymour.

[...]