Snake and Raiden meet Fatman on the battlefield...
Raiden: ! How come you're still alive?!
Fatman: I am invincible!
Snake: But you defeated him on that Heliport, right? "Defused. And Fatman, too."...
Raiden: ...
Raiden: But I saw blood spreading on your blast suit!
Fatman: You mean that ketchup? Maybe some legends are meant to die... but I am not one of them.