According to the helpfile sometimes when you successfully anticipate an attack you get a counterattack. However it doesn't seem to work. Here's a snip:

You foresee a disgusting, rotting zombie's claw and move yourself to safety.
You foresee a disgusting, rotting zombie's claw and move yourself to safety.
You anticipate a disgusting, rotting zombie's bash.
You deftly return a counter strike!
A disgusting, rotting zombie's claw wounds you.
A disgusting, rotting zombie's claw injures you.
A disgusting, rotting zombie's claw mauls you.
A disgusting, rotting zombie dodges your punch.
Your punch devastates a disgusting, rotting zombie!
A disgusting, rotting zombie is writhing in agony.

As you can see there I get an echo that I return a counter strike but I don't get any attacks. (I'm fighting two zombies there so the second zombie hits are the other mob)

This could just be an issue with mob attacks that happen mid-round. I haven't tested this on a player yet.