Kakuzu and Hidan had always expected to live forever, not die. They never thought that they'd be sent to 'hell' together either, but, death has its twists and turns.
When they first walked through the door to the hideout, the first thing they saw was sasori and 'pain'-who was smiling- having a conversation as if it was normal.
"What the f-@!& are you two doing?!" Exclaimed hidan, completely baffled at what he saw in front of him.
Kakuzu just blinked, and than walked to his living quarters.
"Well what does it look like we're doing?!" Questioned... Pain?
Hidan sighed, then walked to his room, mumbling something about being 'too old for this s-&@$'