diff --git a/README.md b/README.md
index f3916b2..5b649f8 100644
--- a/README.md
+++ b/README.md
@@ -38,4 +38,12 @@ Mobile platforms:
 * Mobile Safari
 * Opera Mobile
 
-Please address bugs and your suggestions to [Issues](http://github.com/pepelsbey/shower/issues)
\ No newline at end of file
+Please address bugs and your suggestions to [Issues](http://github.com/pepelsbey/shower/issues)
+
+## Usage examples
+
+* [CSS Management](http://pepelsbey.net/pres/css-management/)
+* [Dynamic Graphics](http://pepelsbey.net/pres/dynamic-graphics/)
+* [Sense Coding](http://pepelsbey.net/pres/sense-coding/)
+* [Special Effects Tea](http://pepelsbey.net/pres/special-effects-tea/)
+* [Web In Curves](http://pepelsbey.net/pres/web-in-curves/)
\ No newline at end of file
diff --git a/scripts/script.js b/scripts/script.js
index 3464961..37fca3b 100755
--- a/scripts/script.js
+++ b/scripts/script.js
@@ -65,6 +65,7 @@
 	}
 
 	function updateProgress(slide_number) {
+		if (!progress) return;
 		progress.style.width = (100 / (slideList.length - 1) * normalizeSlideNumber(slide_number)).toFixed(2) + '%';
 	}