it's an old vine. In youtube there was this guy called Juan (pronounced Huan) who created vines and he once made a parody of the RUN vine which was basically a build up to a part where the song goes "run" and then an epic guitar beat plays. In the parody, David Lopez, a friend of Juan, made a parody with him where he found him in his house while the build up was playing. Then, instead of "RUN" he said "JUAN!" and started chasing him while the epic guitar beat was playing. It's pretty funny. There's a link to check it out. Just go to "youtube video source"
