Rails - Oct 2009 - 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