diff --git a/src/main/java/org/opennars/lab/microworld/Pong.java b/src/main/java/org/opennars/lab/microworld/Pong.java
index 6352a9408e52e5f30b48e84ae6d3be6bfae808ff..fa9bf3cf5ba6d5210a5e47098b7c6939a71ddd38 100755
--- a/src/main/java/org/opennars/lab/microworld/Pong.java
+++ b/src/main/java/org/opennars/lab/microworld/Pong.java
@@ -490,6 +490,8 @@ public class Pong extends Frame {
                     else {
                         ballMisses++;
                         metricObserver.notifyInt("miss", 1);
+
+                        metricObserver.notifyInt("missDistance", (int)diffAbs); // distance of miss
                     }
                 } 
                 oi.x += oi.VX;