In case it's unclear, if you try to escape, if you so much as scratch that glass...
11 seconds sound clip from the The Avengers (2012) movie soundboard.
You can hear this line at 00:51:03 in the Blu-ray version of the movie.
Quote context
[...]
- I've come here to put an end to Loki's schemes.
- Then prove it. Put that hammer down.
- Yeah... No. Bad call. He loves his hammer.
- You want me to put the hammer down?
- In case it's unclear, if you try to escape, if you so much as scratch that glass...
- It's 30000 feet straight down in a steel trap.
- It's an impressive cage. Not built, I think, for me.
[...]