.flipOutX {
  -webkit-animation-name: flipOutX;
  animation-name: flipOutX;
  -webkit-backface-visibility: visible !important;
  backface-visibility: visible !important;
}

@include keyframes(flipOutX) {
  0% {
    -webkit-transform: perspective(400px);
    transform: perspective(400px);
  }

  30% {
    -webkit-transform: perspective(400px) rotate3d(1, 0, 0, -20deg);
    transform: perspective(400px) rotate3d(1, 0, 0, -20deg);
    opacity: 1;
  }

  100% {
    -webkit-transform: perspective(400px) rotate3d(1, 0, 0, 90deg);
    transform: perspective(400px) rotate3d(1, 0, 0, 90deg);
    opacity: 0;
  }
}