Coffeescript Syntax oddities

coffeescript

$('div').live 'pagebeforeshow', (event, ui)->
  $('#statistics').height(70)
  $('#stats-grid-plus-minus a').toggle(->
    $(this).parents('#statistics').animate({ height: "170px"}, 500)
  ->
    $(this).parents('#statistics').animate({ height: "70px"}, 500)
  )

$('div').live('pagebeforeshow', function(event, ui) {
  $('#statistics').height(70);
  return $('#stats-grid-plus-minus a').toggle(function() {
    return $(this).parents('#statistics').animate({
      height: "170px"
    }, 500);
  }, function() {
    return $(this).parents('#statistics').animate({
      height: "70px"
    }, 500);
  });
});