Asynchronous Interaction
<%= image_tag 'async1.png', { :id => 'async1', :class => 'incremental', :alt => 'First request gets sent out' }%>
<%= image_tag 'async2.png', { :id => 'async2', :class => 'incremental', :alt => 'Second request gets sent out' }%>
<%= image_tag 'async3.png', { :id => 'async3', :class => 'incremental', :alt => 'Second request comes back before first' }%>
<%= image_tag 'async4.png', { :id => 'async4', :class => 'incremental', :alt => 'First request gets returned after second' }%>
<%= image_tag 'async5.png', { :id => 'async5', :class => 'incremental', :alt => 'Third request gets sent out' }%>
<%= image_tag 'async6.png', { :id => 'async6', :class => 'incremental', :alt => 'Third request comes back' }%>