Other than the time I almost stepped on a sleeping rattlesnake, I can't recall a time when I had a particularly dangerous encounter with a wild animal.
For that reason, if you asked me to guess how it feels when one is angry at you, I would probably guess that it's an abrupt, fight-or-flight affair that ends quickly with either an attack or the creature running away.
And while there likely have been encounters that went down that way, one Utah man has shown with his riveting video how easily something like that can scare and exhaust you all at once.