diff --git a/DoctrineClassMetadataInstantiator.png b/DoctrineClassMetadataInstantiator.png
new file mode 100644
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diff --git a/explosion.gif b/explosion.gif
new file mode 100644
index 0000000000000000000000000000000000000000..da7ce5d74c41b0c43fccf20bd6e180da871dbdab
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diff --git a/explosion2.gif b/explosion2.gif
new file mode 100644
index 0000000000000000000000000000000000000000..6190e9e299f601d9085d9a9abfb1580a9999163f
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diff --git a/hello.css b/hello.css
index 63b01129f49991ba208ba50d685e474b7d7b3f16..eba93159b831eca444f0074a64af30645288d2e6 100644
--- a/hello.css
+++ b/hello.css
@@ -9,8 +9,16 @@
     box-shadow: none;
     width: 10%;
 }
+.reveal section img[alt=ClassMetadataDiagram] {
+    box-shadow: none;
+}
 
 #gregoire img, #maxime img {
     width: 150px;
     height: 150px;
+}
+
+#la-configuration-yaml-est-d-pr-ci-e {
+    text-shadow: 0px 0px 5px rgba(150, 150, 150, 1);
+    color: #eee;
 }
\ No newline at end of file
diff --git a/index.md b/index.md
index 8dfa4432007488c9261b8b63fe192abc7627d157..9f39671edadbb642876c4e40a7e9e67fe64bc8ef 100644
--- a/index.md
+++ b/index.md
@@ -339,6 +339,22 @@ Note:
 - Si vous n'avez pas besoin de faire des requêtes dynamiques, vous pouvez vous
   passer du Query Builder.
 
+---
+# Random Protips
+
+---
+### Personnaliser l'instanciation
+
+![ClassMetadataDiagram](DoctrineClassMetadataInstantiator.png)
+
+Note:
+- Symfony configure l'entity manager à l'aide d'un configurator qu'il faut
+  décorer si on veut redéfinir la ClassMetadataFactory
+
+---
+<!-- .slide: data-background="./explosion2.gif" -->
+# La configuration YAML est dépréciée
+
 ---
 # Emoji test