It will become a little warm. But it won't be for long.
7 seconds sound clip from the The Masque of the Red Death movie soundboard.
You can hear this line at 00:56:45 in the Blu-ray version of the movie.
Quote context
[...]
- I'm afraid of the town where the Red Death walks.
- I'm afraid of Prospero in his castle.
- Mankind.
- Won't this thing become uncomfortably hot?
- It will become a little warm. But it won't be for long.
- After the unmasking, you can take it off because the game will be over.
- True enough. Get on with it.
- Perfect. Perfect. See yourself.
- Now crouch low. And swing your arms.
[...]