What Does This Button Do?

What Does This Button Do? is a dungeon & raids achievement earned for using Xin the Weaponmaster's secret defense mechanism against him in Mogu'shan Palace on Heroic difficulty.

Strategy
At 66% and 33%, two crystals in the mouths of the quilen statues at opposite (southeast and northwest) corners of the main room activate, announced with emotes:
 * emote (at 66%)
 * emote (at 33%)

Stop DPS at 30% and have two players activate both traps at the SAME time.