Values are lost if drupal_goto is executed

When executing some operation which involves hook_nodeapi() I'd like to inspect the value of $node with pqp($node);

However, at some point during hook_nodeapi() a drupal_goto() is called, which effectively sends the browser to a different page, and I can't actually inspect the contents of $node.

It would be nice if somehow the value of $node was cached (?) or saved somehow, so that it shows up instead of getting lost on a new page load.

drupal_set_message() uses the same logic - drupal (somehow) keeps a record of what messages must be displayed to the user, and only once they're actually displayed does drupal then forget about them. i.e. if a white screen loads due to some code failure and a message is meant to be displayed, the next time a valid page is loaded, that message shows.

Is this possible with PQP?