Interesting uses of fluent interfaces?

unique_words = File.read("words.txt").downcase.split.sort.uniq.length

assertThat(yoda).isInstanceOf(Jedi.class)
    .isEqualTo(foundJedi)
    .isNotEqualTo(foundSith);

# bowling_spec.rb
require 'bowling'

describe Bowling do
  before(:each) do
    @bowling = Bowling.new
  end

  it "should score 0 for gutter game" do
    20.times { @bowling.hit(0) }
    @bowling.score.should == 0
  end
end