When do you spend Hero Dice or Push a power?

[Lindharin]

Hi,

When does a player need to declare the use of the Hero Die if he wants to auto-succeed on a skill check or add an extra 1d6 to his die roll? And is it the same for Pushing a power?

Based on the sidebar on page 15, I have been allowing it after the player hears whether the action was a success/failure, or after the defender makes his defense / soak roll, etc. Is that right?

Thanks!

[BASHMAN]

It's up to the Narrator, I'd say.