On the November 2 airing of 'Weekly Idol,' the show did not have a new guest but showed never-before-seen clips of previous guests!

This included a clip of Red Velvet from when they were promoting "Russian Roulette." The girls tried their hand at dancing to the song at twice the speed!  This didn't make it to the official broadcast, but was saved as a treat for today's special show.

The girls' song is super fast, but they work hard and work well.  There's one collision, but in the end, does the group succeed?  See for yourself below!