Characters
Time for some thrilling heroics.
— Jayne

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker announces that the moment has come to act the hero, and the phrase 'thrilling heroics' gives it a breezy, almost theatrical relish. Bravery is framed as an exciting performance to be enjoyed rather than a grim duty, perhaps with a touch of self-mockery in the grand wording.
Context reviewed