Black rhinos are very nervous in temperament and can be quite aggressive and would react by attacking the threat, even a poacher. I’ve had cases where I’ve gone to dart black rhino and I’ve been attacked.
White rhino are more gregarious, more calm. They respond to threats by just running away. They run away, but the problem with them is that they run to a safe distance and stop, they don’t run away forever. This kind of behavior is one of the reasons why they get poached, also they like to stay in open grasslands.
Black rhino after attacking, if they have to retreat, they retreat into deep bushes and they can ambush you.