Curtain Call

You may take a final bow and attempt any diminish ability that you know, but with an extra penalty that impacts that ability in the same way that diminish does.

(If you succeed with a healing ability which heals you for enough HP, you may heal and avoid falling unconscious. If you took damage in excess of what was needed to reduce you to 0 HP (overkill damage), you must heal at least one more than that damage to stay up, and the healing you receive is reduced by the overkill.
ex: If you had 2 HP and took 11 damage, you would be overkilled by 9 damage and you would need to heal yourself for at least 10 HP to heal yourself to 1 HP and avoid falling unconscious).
(This ability cannot be used with other abilities which cause you to be reduced to 1 HP instead of 0, such as Not Even Close, Holy Avenger, Adamant Body, Endure, or the Tough trait)

Overkill:
Overkill damage is any extra damage beyond that needed to reduce a character to 0 HP. For example, if you have 1 HP left, and take 11 damage, you took 10 overkill damage.

If you are defeated by an ambush, you may use Curtain Call. At that point, you are assuredly aware that something has happened.