diff --git a/slides.tex b/slides.tex
index 5803df6..f5a1556 100644
--- a/slides.tex
+++ b/slides.tex
@@ -36,9 +36,9 @@
 \newcommand{\cmark}{\color{OliveGreen}\ding{52}}
 \newcommand{\xmark}{\color{BrickRed}\ding{56}}
 
-\let\tempone\itemize
-\let\temptwo\enditemize
-\renewenvironment{itemize}{\tempone\addtolength{\itemsep}{0.5\baselineskip}}{\temptwo}
+%\let\tempone\itemize
+%\let\temptwo\enditemize
+%\renewenvironment{itemize}{\tempone\addtolength{\itemsep}{0.5\baselineskip}}{\temptwo}
 
 
 
@@ -498,8 +498,8 @@ Segmentation fault.
                 \item Heuristic to decide whether we index with \reg{rbp} or
                     \reg{rsp}
             \end{itemize}
-        \item By performing \alert{symbolic execution} with an abstract
-            semantics, we can \alert{synthesize the
+        \item With a \alert{symbolic execution} with an abstract semantics,\\
+            we can \alert{synthesize the
             unwinding table} line by line.
         \item Control flow: forward data-flow analysis
         \item The fixpoints are immediate, cf article
@@ -535,8 +535,10 @@ Segmentation fault.
 
     \pause{}
 
-    So much that \prog{perf} doesn't use it by default! You must use
-    \lstbash{perf report --call-graph dwarf} explicitly!
+    So much that \prog{perf} cannot unwind online!
+
+    It must \alert{copy to disk the whole call stack} every few instants and
+    \alert{analyze it later} at report time!
 \end{frame}
 
 \sectiontitleframe{}