Dog/cat get in fight

gistfile1.txt

class Dog
  def bark_at(cat)
    "Curse you #{cat}!!"
  end
end

class Cat
  def initialize(name)
    @name = name
  end

  def to_s
    sleep 3
    @name
  end
end

c = Cat.new('meowkins')
d = Dog.new
d.bark_at(c)