On a quest for immediate actions

[S_Grey]

I've been wondering about how many different kinds of immediate actions could be possessed by a single character. Obviously only immediate action per round could be made, so stack too many would be bad, but since when has poor building ever stopped a think tank?

I suppose AoO could count too, since that's kinda the original immediate action, except not.

What do you think? What's your favorite immediate action?

[docnessuno]

The Celerity spell line is probably the best possible use for an immediate action.
And quite broken too.