Survive the music. There is no try, there is no spoon, and there is no mute button.
The When Techno Music Attacks! Challenge was a challenge for the games - Music in Motion - and ELEPHANT RAVE that was released on June 12th, 2008 and lasted until June 19th, 2008. To complete it, the player had to reach the boss on stage 4 in Music in Motion, and survive 500 frames, or about 15 seconds, in Elephant Rave. Completing the challenge would give the player the Replay 1 version of the Juju card.