animate.css/source/bouncing_exits/bounceOut.css

@keyframes bounceOut {
  20% {
    transform: scale3d(.9, .9, .9);
  }

  50%, 55% {
    opacity: 1;
    transform: scale3d(1.1, 1.1, 1.1);
  }

  100% {
    opacity: 0;
    transform: scale3d(.3, .3, .3);
  }
}

.bounceOut {
  animation-name: bounceOut;
  animation-duration: .75s;
}