diff --git a/Shepherd.pdf b/Shepherd.pdf
index 7464a6c8b6825a40bb053ea351f6f4cdc2f6a832..4845bedc68a07b2046008d09edb0e016a7b7ebb8 100644
Binary files a/Shepherd.pdf and b/Shepherd.pdf differ
diff --git a/Shepherd.tex b/Shepherd.tex
index 0024e01aae5d7a64b5bd9a181a151606faf8544f..7792ab50c27ef365cfdf8c5008bf377047026422 100644
--- a/Shepherd.tex
+++ b/Shepherd.tex
@@ -286,7 +286,8 @@ them. However, you are free to do the challenges in any order you want.
 \begin{description}
     \item[Session Management Challenge 1] Try replacing \enquote{user} with
         \enquote{administrator}. But where?
-    \item[Poor Data Validation 1]
+    \item[Poor Data Validation 1]. The \enquote{troll} here means the third
+        image, i.e. a \enquote{trollface}. Google it if you are unsure.
     \item[Cross Site Scripting 1]
     \item[Session Management Challenge 2] Try attacking the password reset.
     \item[Session Management Challenge 3]