Precedence between ruby blocks

blocks.rb

def first_function(something, &block)
  puts "First - Do I have a Block? #{block_given?}"
end

def second_function(&block)
  puts "Second - Do I have a Block? #{block_given?}"
end

puts "USING: {}"
first_function second_function { 'YEAP' }

puts

puts "USING: do/end"
first_function second_function do 'YEAP' end