He thinks I'm gonna die but he won't know next time I see him he'll be the loser
Man vs. Man
Nope, I survived the fall and swam back to your house
I thought you died during that fall. How did you get here?
Zaroff told Rainsford about the hunting games he did with humans. At first Rainsford didn't want to play along but he later realized he had no choice or he would have to go do whatever Ivan said.
Rainsford could see Zaroff's home from the cliff and below him was the sea. So when he heard the hounds coming he jumped off. When Zaroff finally reached the cliff he looked down and shrugged and went back hom.
Zaroff went to his bedroom after a nice meal and locked the door and turned on the light. When he turned around he was startled by Rainsford who was hiding. After that Rainsford wanted to fight him and kill because the challenge wasn't over for him. So Rainsford won the fight and killed Zaroff and went to sleep on his comfortable bed.