diff --git a/slides.tex b/slides.tex
index 913d13c..913c2e1 100644
--- a/slides.tex
+++ b/slides.tex
@@ -130,7 +130,7 @@
 \begin{frame}[fragile]{}
     \begin{columns}[c]
         \begin{column}{0.65\textwidth}
-            \begin{lstlisting}[language=gdb, numbers=none, escapechar=|]
+            \begin{lstlisting}[basicstyle=\tt,language=gdb, numbers=none, escapechar=|]
 $ ./a.out
 Segmentation fault.
 
@@ -241,22 +241,26 @@ Segmentation fault.
             by a \alert{Turing-complete stack machine}!}
     \end{itemize}
 
-    \pause{}
+    \only<2->{
+        \begin{textblock*}{0.90\textwidth}[0.5,0](0.5\paperwidth,0.17\paperheight)%
+            \begin{tcolorbox}[halign=center, colframe=red, colback=Lavender]
+                \bf \huge
+                Complex \,\& \,slow
+            \end{tcolorbox}
+        \end{textblock*}
+    }
 
-    \vspace{-5cm}
-    \begin{tcolorbox}[halign=center, colframe=red, colback=Lavender]
-        \bf \huge
-        Complex \,\& \,slow
-    \end{tcolorbox}
-
-	\pause{}
-    \begin{tcolorbox}[halign=center, colframe=red, colback=Lavender]
-        \huge
-        \textbf{Pervasive:}\\ relied upon by debuggers, profilers, C++
-        exceptions \\
-        \medskip{}
-        \textbf{$\leadsto$ not only for debuggers!}
-	\end{tcolorbox}
+    \only<3->{
+        \begin{textblock*}{0.90\textwidth}[0.5,0](0.5\paperwidth,0.35\paperheight)%
+            \begin{tcolorbox}[halign=center, colframe=red, colback=Lavender]
+                \huge
+                \textbf{Pervasive:}\\ relied upon by debuggers, profilers, C++
+                exceptions \\
+                \medskip{}
+                \textbf{$\leadsto$ not only for debuggers!}
+            \end{tcolorbox}
+        \end{textblock*}
+    }
 \end{frame}
 
 \newcommand{\LinusMailOne}{
@@ -442,7 +446,7 @@ Segmentation fault.
     \begin{tikzpicture}
         \begin{scope}[every node/.style={rectangle,thick,draw,scale=0.95}]
             \node (dwarf) at (0, 0) {
-                \lstinputlisting[basicstyle=\tiny,numbers=none,language=]{src/dw_plt_abbr}
+                \lstinputlisting[basicstyle=\tiny\tt,numbers=none,language=]{src/dw_plt_abbr}
             };
 
             \only<2->{