After G-Friend first wowed the scene with their incredible performance of "Rough" at roughly two times the speed, Red Velvet is next to take on the challenge on 'Weekly Idol' - and they were also as jaw-droppingly successful!

Their dance for "Dumb Dumb" involves a lot of jerky movements and energy, so the girls can't help but scream as they quickly move to position and perform the choreo, but they did a very good job!  This looks like a super intense workout.

Be impressed!  Watch below!