No telling what?
3 seconds sound clip from the Willy Wonka & the Chocolate Factory movie soundboard.
You can hear this line at 01:06:19 in the Blu-ray version of the movie.
Quote context
[...]
- Sie kommen jetzt in den interessantesten und gleichzeitig geheimsten raum meiner fabrik.
- I can't take much more of this.
- Meine Dammen und Herren, Der Inventing Room.
- Now remember, no messing about. No touching, no tasting, no telling.
- You see, all of my most secret inventions are cooking and simmering in here.
- Old Slugworth would give his false teeth to get inside for just five minutes...
(Wonka's Inventing Room Soundscape)
[...]