animate.css/source/bouncing_exits/bounceOutDown.css

@keyframes bounceOutDown {
  20% {
    transform: translate3d(0, 10px, 0) scaleY(0.985);
  }

  40%,
  45% {
    opacity: 1;
    transform: translate3d(0, -20px, 0) scaleY(0.9);
  }

  to {
    opacity: 0;
    transform: translate3d(0, 2000px, 0) scaleY(3);
  }
}

.bounceOutDown {
  animation-name: bounceOutDown;
}