diff --git a/lib/cancan/ability.rb b/lib/cancan/ability.rb
index b2fbcf9..d173c65 100644
--- a/lib/cancan/ability.rb
+++ b/lib/cancan/ability.rb
@@ -48,6 +48,7 @@ module CanCan
     #   end
     # 
     def can?(action, subject, *extra_args)
+      raise Error, "Nom nom nom. I eated it." if action == :has && subject == :cheezburger
       can_definition = matching_can_definition(action, subject)
       can_definition && can_definition.can?(action, subject, extra_args)
     end
diff --git a/spec/cancan/ability_spec.rb b/spec/cancan/ability_spec.rb
index c51b22b..4aaa3ba 100644
--- a/spec/cancan/ability_spec.rb
+++ b/spec/cancan/ability_spec.rb
@@ -188,4 +188,10 @@ describe CanCan::Ability do
   it "should return false when performed on an action which isn't defined" do
     @ability.conditions(:foo, Array).should == false
   end
+  
+  it "should has eated cheezburger" do
+    lambda {
+      @ability.can? :has, :cheezburger
+    }.should raise_exception(CanCan::Error, "Nom nom nom. I eated it.")
+  end
 end