Terrify ability

What is the effect of terrify supposed to be ?
I see minions turn around and run away. However, hero characters sometimes turn around and other times keep moving forward, while trying to keep a 5m distance from Tharin.

For the next 5s, all enemy units that were affected by Terrify will move in a random direction. This will stop any actions that they were previously doing or are told to do while they are terrified. It’s essentially random which way they move, so you might lose a game or two based on bad luck.