What's up, RMers?

[Ahzoh]

But how could they become faster if they are already shaking in fear? It could have been an interesting feature if it made more sense to me. Perhaps changing another stat could make it more appealing and reasonable, guarding might be a better option.

Because flight or fight response?
In the "flight", the character can run faster, but in the "fight", they are less accurate and steady, they would have a reduction in "nerve".

It is entirely possible for one to respond with flight, and then decide to respond with fight, and vice versa. One can also lose their nerve, becoming paralyzed in fear, or regain it. Hence the "chance of not being able to attack"; the character needs to "gain some nerve" before they can attack.

Do you see the logic now? However, I can't be 100% realistic here though.