It's a very rapidly growing field.
3 seconds sound clip from the The Muppet Movie (1979) movie soundboard.
You can hear this line at 00:57:56.539 in the Blu-ray version of the movie.
Quote context
[...]
- It's good to see you, Doc, you little rustic devil, you.
- Where's my victim? I mean, patient?
- Step this way, Professor. Let me introduce you to your patient.
- Professor Krassman is the world's leadin' authority on mind control in frogs.
- It's a very rapidly growing field.
- Tell us what you're gonna do to our little Kermit.
- Well, we're going to perform an electronic cerebrectomy.
- A what?
- It's something so sensational that you'll have to hold on to your hat.
- Yes?
[...]