diff --git a/categories.html b/categories.html
index 1292044..7f8d8b0 100644
--- a/categories.html
+++ b/categories.html
@@ -97,7 +97,7 @@
 </ul>
 </section>
 <section class="slide">
-<img src="categories/img/head_explode.jpg" alt="head explode" style="width: 80%"/>
+<img src="categories/img/mindblown.gif" alt="head explode" style="width: 50%; margin-top: 2em;padding: 1px; box-shadow: 0 0 5em #A88; border: none"/>
 </section>
 <section class="slide">
 <h2 id="category-theory-for-programming">Category Theory for programming?</h2>
diff --git a/categories/10_Introduction/040_head_explode.html b/categories/10_Introduction/040_head_explode.html
index db0022f..3655e12 100644
--- a/categories/10_Introduction/040_head_explode.html
+++ b/categories/10_Introduction/040_head_explode.html
@@ -1 +1 @@
-<img src="categories/img/head_explode.jpg" alt="head explode" style="width: 80%"/>
+<img src="categories/img/mindblown.gif" alt="head explode" style="width: 50%; margin-top: 2em;padding: 1px; box-shadow: 0 0 5em #A88; border: none"/>