.a-three-flip-down {
  @include keyframes(threeFlipDown) {
    0% {
      transform: rotateX(0);
    }

    100% {
      transform: rotateX(-90deg);
    }
  }

  transform: rotateX(90deg);
  transform-origin: 0 100%;

  @include show();
  @include animate(threeFlipDown $perspective-bounce-timing ease-in-out 1);
}