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diff --git a/presentation/intro.md b/presentation/intro.md
index 2eccc2e6b81ccd54afa8c58962d87ed77cc7395a..4ec285a24ec79cb0baca6f1271c28a349b43c206 100644
--- a/presentation/intro.md
+++ b/presentation/intro.md
@@ -1,5 +1,5 @@
 ---
-title: Cours de programmation séquentielle
+title: Tech Lunch - Intro à Rust
 author: Orestis Malaspinas
 date: 11 janvier 2019
 sansfont: Sans Serif
@@ -24,11 +24,15 @@ pdfMaxPagesPerSlide:
 - Créé comme projet personnel par Graydon Hoare chez Mozilla en 2006.
 - Financé par Mozilla dès 2010.
 - Rendu public la première fois en 2012 (version 0.4).
-- Orientation vers la programmation système.
 - Première version stable (1.0) en 2015.
-- La très grande majorité des fonctionnalités du langages ont été retirées.
 - Stabilisation de fonctionnalités tous les 6 semaines.
-- Version stable actuelle 1.31. <!-- TODO UPDATE -->
+- Version stable actuelle 1.31.1 <!-- TODO UPDATE -->
+
+## Un développement pragmatique
+
+- La très grande majorité des fonctionnalités originelles ont été retirées.
+- Développement du langage orienté sur la communauté: *Request For Comments*.
+- Langage système et de haut niveau: *Memory safety & concurrency without fear*.
 
 # Projets basés sur Rust
 
@@ -41,7 +45,10 @@ pdfMaxPagesPerSlide:
 - Cargo.
 - Tor (en phase de tests).
 - Redox (microkernel).
-- <https://www.rust-lang.org/en-US/friends.html>
+
+. . .
+
+*<https://www.rust-lang.org/en-US/friends.html>*
 
 # Concepts de base
 
@@ -51,29 +58,110 @@ pdfMaxPagesPerSlide:
 	- Pas de seg-faults.
 	- Pas d'accès concurrents.
 	- Un système de type expressif.
-
+. . .
 - Sans coût de performance
 	- Pas de garbage collector.
 	- Pas d'overhead à l'exécution.
 
-- **Un langage "système" dans lequel on peut avoir confiance.**
+. . .
+
+**Un langage "système" dans lequel on peut avoir confiance.**
+
+- Productif: développement rapide, et exécution efficace.
+- Projets "plus simples" à maintenir.
+
+. . .
+
+*Zero-cost abstractions & memory safety & data-race free* 
 <!-- Productivité: efficacité et maintenance "simple". -->
 
-# Sûreté mémoire
+# (Non-)sûreté mémoire
 
 ## Performance: un peu de C++
 
-```{.cpp}
+:::::::::::::: {.columns}
+::: {.column width="50%"}
+```
+{
+	vector<string> v; // alloué sur la pile
+					  // et l'espace est
+					  // contigu en mémoire
+	...
+	auto& elem = v[0]; // référence
+	...
+} // destruction automatique
+```
+:::
+::: {.column width="50%"}
+![](figs/mem_vec_str.svg){#fig:mem_vec_str width=80%}
+:::
+::::::::::::::
+
+## Et la sécurité dans tout ça?
+
+:::::::::::::: {.columns}
+::: {.column width="50%"}
+```
 {
-	vector<string> v; // alloué sur la pile et l'espace est 
+	vector<string> v; // alloué sur la pile
+					  // et l'espace est
 					  // contigu en mémoire
 	...
 	auto& elem = v[0]; // référence
+	v.push_back(a_string);
+	cout << elem;
 	...
 } // destruction automatique
 ```
+:::
+::: {.column width="50%"}
+![](figs/mem_vec_str_error.svg){#fig:mem_vec_str width=80%}
+:::
+::::::::::::::
+
+. . .
+
+Quel est le problème dans ce code?
+
+. . .
+
+**`elem` est un pointeur pendouillant!**
+
+## D'où provient le problème?
+
+- Deux contraintes doivent être satisfaites en même temps
+	1. Aliasing à l'élément 0 de `vector`.
+	2. Modification de `vector` (désalloué et réalloué ailleurs).
+
+- Simple de suivre *une* référence, difficile de les mettre à jour toutes.
+
+# Sûreté mémoire en Rust
+
+## Ownership
+
+- On est **propriétaire** des données.
+- On peut faire ce qu'on veut avec:
+	1. Les lire.
+	2. Les modifier.
+	3. Les donner à quelqu'un d'autre.
+
+. . .
+
+![Source: [Wikipedia](https://upload.wikimedia.org/wikipedia/commons/d/d3/BibliothekSG.jpg)](https://upload.wikimedia.org/wikipedia/commons/d/d3/BibliothekSG.jpg)
+
+. . .
+
+Voyons ce que ça donne sur un exemple pratique.
+
+## Ownership en pratique
+
+
+
+<!-- - `vector` et `string` sont alignés en mémoire.
+- références "light".
+- destruction déterministe. -->
 
-##
+<!-- ## Généralités
 
 - Fortement typé.
 - Pas d'accès mémoire illégal.
@@ -100,5 +188,5 @@ pdfMaxPagesPerSlide:
 - Le compilateur a des règles très strictes...
 - ... mais il est possible de contourner les règles.
 - Syntaxe spéciale pour autoriser les comportement potentiellement dangereux (`unsafe`{.lang-rust}).
-- Un guide pour bien vivre dangereusement <https://doc.rust-lang.org/nomicon/>.
+- Un guide pour bien vivre dangereusement <https://doc.rust-lang.org/nomicon/>. -->