Basic Trope: A character attempts to be redeemed but is denied.
Straight: John is about to help Bob, but he is killed by Jason.
Exaggerated: John gets a heart attack the millisecond he even considers repenting.
Downplayed: John thinks about helping Bob, but does not. John goes on to live a full life for many years and to a ripe old age but dies of heart attack caused the guilt of not helping Bob once he gives it a thought one day.