I've heard of Batmanning (hanging precariously from different places by your feet), planking, and Tebowing. But now that just seems boring, right?
I don't necessarily agree with this, but some people thought there needed to be another trend. Enter "Unicorning".
My first question is "What?????" Stick a colored horn on your forehead? Walk around on all fours?? Well, to answer your question, there is an entire website dedicated to just that. Here ya go ... in case you are interested, or just want to observe the craziness.
By Yamavu [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-2.5 (http://creativecommons.org/licenses/by/2.5)], via Wikimedia Commons