.a-flip-scale {
  @include keyframes(flipScale) {
    0% {
      transform: scale(1) rotate3d(-1, 1, 0, 0deg);
    }

    50% {
      transform: scale(0.4) rotate3d(-1, 1, 0, -90deg);
    }

    75% {
      transform: scale(1) rotate3d(-1, 1, 0, -180deg);
    }

    100% {
      transform: scale(1) rotate3d(-1, 1, 0, -360deg);
    }
  }

  @include show();
  @include animate(flipScale 1s ease-in-out 1);
}