I'm going in with you.

2 seconds sound clip from the Creature from the Black Lagoon (1954) movie soundboard.

You can hear this line at 01:02:41.122 in the Blu-ray version of the movie.

Quote context

[...]

- Whoa! Take it away! Easy. A little more. Whoa.

- Take it away! Take it up. More, more. Hold it. All right, take it away! Up, up!

- She must have slipped.

- We'll just have to try it again.

- How, David?

- I'll have to use the Aqua-Lung.

- I'm going to help him.

- I'm going in with you.

- Mark, all we're interested in right now is getting the entrance to this lagoon cleared.

- I'll be the bait for him.

- Oh, Mark, get out of my way.

- Let it come to me, David. It'll give you a chance to get at him.

[...]