Update README.md

sirjamesgray · web-flow · commit e1abdbacc816 · 2018-06-14T11:50:22.000-05:00
diff --git a/README.md b/README.md
@@ -7,3 +7,5 @@ Primary intent:
 - Show Table of Contents as a sticky sidebar
 - Sticky header for current scroll position context
 - Show current scroll position in sidebar 
+
+![nav-wiki scrolling](https://user-images.githubusercontent.com/16139439/41426273-bd9b1bbe-6fc8-11e8-81f4-7581255a526a.gif)
