DCI how I want it to work

dci_example.rb

module BadFlyer
  def fly
    puts 'Not a chance'
    false
  end
end

module Runner
  def run
    puts 'Run, #{self}! Run!'
  end
end

class User; end
man = User.new

class Penguin; end
tux = Penguin.new

use(man).as(Runner) do |runner|
runner.run
end

use(tux).as(Runner, BadFlyer) do |funny_runner|
  puts 'Lets try...'
  funny_runner.fly || funny_runner.run
end