gistfile1.txt

module MotionModel
  module Model
    def save(*)
      puts "called MM#save"
    end
  end
end

module MotionModel
  module Paranoid
    def save(paranoid = false)
      puts paranoid ? super : "error because it is not valid"
    end
  end
end

class MyModel
  include MotionModel::Model
  include MotionModel::Paranoid
end

model = MyModel.new
model.save
model.save(true)