use extract_options!

actionpack/lib/abstract_controller/callbacks.rb

@@ -71,7 +71,7 @@ def skip_action_callback(*names)
       # * <tt>name</tt>     - The callback to be added
       # * <tt>options</tt>  - A hash of options to be used when adding the callback
       def _insert_callbacks(callbacks, block = nil)
-        options = callbacks.last.is_a?(Hash) ? callbacks.pop : {}
+        options = callbacks.extract_options!
         _normalize_callback_options(options)
         callbacks.push(block) if block
         callbacks.each do |callback|