Zombie

Zombie refers to the state when you have negative health but didn't die. This state notably makes Crash invulnerable to most things. To get Zombie, you need to die but interrupt the death process with a cutscene. Crash movement and/or the camera generally stay locked after the cutscene. It's thought that one thing that unlocks Crash movement are cutscenes that change Cortex' state (normal, Doc Amok or Pipe). To lose Zombie you need to get back to a normal health value by grabbing a mask.