diff --git a/1to4-Nonblocking-Streaming/bin/five-times-evented.psgi b/1to4-Nonblocking-Streaming/bin/five-times-evented.psgi
index 2ea48ef..4d83aea 100644
--- a/1to4-Nonblocking-Streaming/bin/five-times-evented.psgi
+++ b/1to4-Nonblocking-Streaming/bin/five-times-evented.psgi
@@ -2,18 +2,19 @@ use AnyEvent;
 use warnings;
 use strict;
 
-my $watcher;
 my $timer_model = sub {
   my $writer = shift;
   my $count = 1;
-  $watcher = AnyEvent->timer(
+  my $timer;
+  $timer = AnyEvent->timer(
     after => 0,
     interval => 1,
     cb => sub {
       $writer->write(scalar localtime ."\n");
       if(++$count > 5) {
         $writer->close;
-        undef $watcher;
+        # this cancels the timer, and breaks a circular reference
+        undef $timer;
       }
     });
 };
@@ -26,6 +27,7 @@ my $psgi_app = sub {
       [200, [ 'Content-Type' => 'text/plain' ]]);
 
     $timer_model->($writer);
-    
+    # our timer lives on via a circular reference.
+    # return value is ignored
   };
 };