So this is what I'm currently doing for the AfterMove event, which works... mostly.  Please note you do have to hook the event up.

void Document_AfterMove(object sender, MoveEventArgs e)
{
    Page page = ((Document)sender).HttpContext.Handler as Page;
    ((BasePage)page).speechBubble(BasePage.speechBubbleIcon.success, "Title", "Message");
}

There is no need for the Document reference.  Here is a static method I have used to handle event exceptions.  Just call it in a try catch and pass in the exception.

        private static void ShowErrorBubble(string title, Exception exception)

        {

            ((BasePage)HttpContext.Current.Handler).speechBubble(BasePage.speechBubbleIcon.error, title, exception.Message);

        }

Here's prettier code:

  private static void ShowErrorBubble(string title, Exception exception)

        {

            ((BasePage)HttpContext.Current.Handler).speechBubble(BasePage.speechBubbleIcon.error, title, exception.Message);

        }

One more time:

private static void ShowErrorBubble(string title, Exception exception)
{
       ((BasePage)HttpContext.Current.Handler).speechBubble(BasePage.speechBubbleIcon.error, title, exception.Message);        
}

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