Do AR callbacks know why they were called?

Hi all -

I was thinking today (dangerous) and got to wondering if AR callbacks know why there were called. That is, do they know what triggered them.

Say I have......

class Foo << AR::Base
    before_destroy :bar

    before_create :bar

    def bar
      # Can I determine if I am creating or destroying here?
    end
end

Let's assume for a moment that new_record? isn't available as I know that would catch the before_create one, but wouldn't work for before_save/after_save/etc...

I didn't see anything in perusing the docs/source, but might have missed it...

Anyone know?

-philip