What are some examples of when Kenai from Brother Bear gets angry?

His first anger is the one that gets him in the most trouble. After his brother is killed by a bear, he pursues the bear and kills it to avenge his brother's death. The spirits are angry with him and turn him into a bear, his fate until he learns lessons about how to "walk in someone else's shoes." When he realizes the harm he has done in killing the bear, he understands much about why bears act the way they do when they interact with humans.