"It must be done at once: God moves Swiftly to cancel the folly of stubborn men."-Choragos, (pg.673 Ln. 90)
Choragos was saying that if Creon didn't hurry to free Antigone, that god would be quick to punish him.
The Cheetah resembles god, he was quick to punish Creon as they arrived where they kept Antigone after she had hanged herself.