The song Rigor Mortis is performed by Immolation .
You're dying but you're still alive
Slow gradual decay
Doused with chemicals forever your cursed
To walk the earth as undead
Eating the brains the way to endure
The painfulness of death
Stiffening of your muscles
But you cannot die
Rigor mortis, settles in
Rotting corpse, blackened skin
Decayed bones, rotten flesh
Rigor Mortis, after death
But you are still a corpse beneath the earth
Rancid souls await rebirth
Acid rain brings them to life
destiny of strife
Lurking in the streets
Your flesh they need to eat
Feel the horrid chill
Knowing they can't be killed