https://www.youtube.com/watch?v=0EUEg7kd6Cg&x-yt-ts=1422579428&x-yt-cl=85114404#t=13

DALLAS, TX (WLOX) - A Texas teacher's dance video with his students through the halls of their high school will make you want to get up and dance... or at least make you smile.
It takes place at A. Maceo Smith New Tech High School in Dallas, Texas to the the Mark Ronson/Bruno Mars hit "Uptown Funk." Theatre Arts Teacher Scot Pankey starts the dancing with just two students, then more join in, and even more until they fill the hallway. And if you think the dancing is impressive, think about the photographer who stayed one step ahead of the dancers, and did it all while moving backwards.
According to the Dallas Morning News, the video was the students' first project of the year, and was filmed in a single take. As of Tuesday night, the YouTube video was closing in on two million views.