In horror movies like that the characters struggle through the story for two whole hours, fighting off the killer at every turn. Some of the characters don’t make it, but there’s always that one or two who do.
By the end of the movie, they’re bruised and battered and most certainly, traumatized by what they’ve been through. Then they have that one last fight to the death with the killer, and it’s the most intense yet.
They hit him over the head with a lamp, but he’s still coming for them. They stab him in the leg with a butcher knife, but he gets up and keeps coming. They push him over the third floor railing, and he may be weak now, but he’s still trying to kill them. Then they douse him with gasoline...