- What's that for?
- That's the machine that goes 'ping.'

— (Graham Chapman)

5 seconds sound clip from the Monty Python's The Meaning of Life movie soundboard.

You can hear this line at 00:22:42.671 in the Blu-ray version of the movie.

Quote context

[...]

- Can I put the tube in the baby's head?

- Only if I can do the episiotomy.

- Okay.

- Thank you.

- Legs up.

- Oh, come in. Come on in, all of you. That's it. Jolly good. Come on. Come along. Spread round there.

- Who are you?

- I'm the husband.

- I'm sorry. Only people involved are allowed in here.

- What do I do?

- Yes?

- What do I do?

- Nothing, dear. You're not qualified.

- Leave it to us.

- What's that for?

- That's the machine that goes 'ping.'

- You see? That means your baby is still alive.

- And that's the most expensive machine in the whole hospital.

- Yes, it cost over three-quarters of a million pounds.

- Aren't you lucky?

- The administrator is here, Doctor.

- Switch everything on.

[...]