Nah was not dead, just took a nap.

Prerequisites: Fall unconscious during an encounter and afterwards significantly contribute to winning the same encounter

Benefit: Once per encounter, directly after you were unconscious for at least on round, you can choose one of the following benefits:

Regain hit points equal to your constituion modifier

Regain a single spell (power, maneuver or spell-like) you already expended. You cannot regain an ultimate ability this way however.