Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

Q: In Kung Fu Panda 3, when we learn the history between Kai and Oogway, we see that they used to be brother in arms and when the later was seriously injured, Kai took him to the secret Panda village where the Pandas taught Oogway how to give chi. Kai wanted the power for himself and they fought, Oogway won and banished Kai in the spirit realm.  But later into the movie, Kai says that it was Oogway that betrayed him. Why did Kai say that? Did Oogway actually betray him?

A: Why did Kai believe that Oogway betrayed him in Kung Fu Panda 3?
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Q: During the first episode of Season 3 of The Walking Dead, I noticed the group is now very cavalier about taking down walkers:    This is a staunch contrast from the first season when they covered themselves in walker parts to get through Atlanta. I don't have that scene handy but, in my mind, it seems like they were very cautious in how they covered themselves (e.g. seemed like they were wearing HAZMAT suits).  I understand that, as time passes, the characters learn more Walker do's and don'ts; but I was under the impression if Walker blood got in their system, they would turn.  Is this true or have I imagined this rule?

A: As of S03E01, does walker blood have an effect on open orifices/wounds?
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Q: In the movie Predator  (1987), near the climax, when the Predator finds Arnold, it did not try to kill him immediately. Instead, it goes near him and checks his head and removes its helmet (I am assuming that it would be its helmet).   Why did it not kill Arnold immediately as it killed everybody else? Did checking Arnold's head mean something?

A:
Why did the Predator not kill Arnold immediately as it killed everybody else?
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