-webkit- stuff only works on webkit browsers. I'm pretty sure that using the standard `transform:` here works in most modern browsers.
@@ -75,7 +75,7 @@
<p>That's it, time to go back up.</p>
<br>
<a href="#/2">
- <img width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Up arrow" style="-webkit-transform: rotate(180deg);">
+ <img width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Up arrow" style="transform: rotate(180deg); -webkit-transform: rotate(180deg);">
</a>
</section>