Calvin wasn't idle either as Heisenberg and Ricardo made their escape.
There was one thing that he must do now that he had the carcass of a Corpse Eater inside this room.
Fortunately, Calvin had enough time to do what he must do.
Corpse Eaters were relentless monsters that know no pain, nor the existence of stamina. They were tireless and ruthless monsters that would chase you to the end until they had eaten your brains out. With this considered, Corpse Eaters were monsters that Calvin had always considered as a pain in the ass to deal with.
Especially due to their ridiculous regenerative capabilities. In fact, some Corpse Eaters such as the Graved Dead were able to regenerate their entire body so long as their brain stem exists. But despite this seemingly monstrous ability to recover making them an incredibly difficult enemy to deal with. Corpse Eaters still had a defined weakness.