diff --git a/doc/slides/slides.tex b/doc/slides/slides.tex
index 05478eae26d5e55f6a76ba793f6d3997889de600..dcfe90b4a25b321883569a610e388d50b73b9045 100644
--- a/doc/slides/slides.tex
+++ b/doc/slides/slides.tex
@@ -173,9 +173,12 @@
         representation~$\mathcal{E}$} to \emph{database storage~$\mathcal{D}$}.
     \item When $\mathcal{E}$ changes, so does~$\mathcal{E}$ when a new
       export is run. This should result in~$\mathcal{D}$ changing as well.
-    \item Not trivial! A work around is (1)~re-creating databases from
-      scratch and (2)~splitting up knowledge into smaller repositories.
   \end{itemize}
+
+  \begin{alertblock}{Huh!}
+    Not trivial! A work around is (1)~re-creating databases from
+    scratch and (2)~splitting up knowledge into smaller repositories.
+  \end{alertblock}
 \end{frame}
 
 % [Applications & Questions]
@@ -208,9 +211,12 @@
       with RDF4J that looks at what ULO~predicates are used.
     \item Both Coq and Isabelle exports used less than a third of all
       ULO~predicates. Many predicates are used by neither exports.
-    \item Queries formulated for a tetrapodal search system have to
-      account for these ``holes'' in existing data sets.
   \end{itemize}
+
+  \begin{alertblock}{Huh!}
+    Queries formulated for a tetrapodal search system have to
+    account for these ``holes'' in existing data sets.
+  \end{alertblock}
 \end{frame}
 
 \begin{frame}{Exploration: Used Predicates}
@@ -279,9 +285,12 @@
         \item Algorithms aren't programs! Programs implement
           algorithms that solve problems.
       \end{itemize}
-    \item This illustrates the difficulty in designing an ontology
-      (schema) that is both expressive and concise.
   \end{itemize}
+
+  \begin{alertblock}{Huh!}
+    This illustrates the difficulty in designing an ontology
+    (schema) that is both expressive and concise.
+  \end{alertblock}
 \end{frame}
 
 % [Summary]