Bicycles at Burning Man, 2004<br>A few thousand people on bikes, Burning Man 2004
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/12037949632@N01">Stewart Butterfield</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/12037949632@N01/383438">Flickr</a>