animate.css/source/attention_seekers/headShake.css

@keyframes headShake {
  0% {
    transform: translateX(0);
  }

  6.5% {
    transform: translateX(-6px) rotateY(-9deg);
  }

  18.5% {
    transform: translateX(5px) rotateY(7deg);
  }

  31.5% {
    transform: translateX(-3px) rotateY(-5deg);
  }

  43.5% {
    transform: translateX(2px) rotateY(3deg);
  }

  50% {
    transform: translateX(0);
  }
}

.headShake {
  animation-timing-function: ease-in-out;
  animation-name: headShake;
}