Stop caching for a specific node (by nid) Drupal 7
A module with the below in it should stop caching on node 2. Change the number to do it on a different node id.

function MYMODULE_init(){
  if (arg(0) == 'node' &amp;&amp; arg(1) == 2) {
    drupal_page_is_cacheable(FALSE);
  }
}