animate.css/source/bounce.css

@-webkit-keyframes bounce {
	0%, 20%, 50%, 80%, 100% {-webkit-transform: translateY(0);}
	40% {-webkit-transform: translateY(-30px);}
	60% {-webkit-transform: translateY(-15px);}
}

@-moz-keyframes bounce {
	0%, 20%, 50%, 80%, 100% {-moz-transform: translateY(0);}
	40% {-moz-transform: translateY(-30px);}
	60% {-moz-transform: translateY(-15px);}
}

@-o-keyframes bounce {
	0%, 20%, 50%, 80%, 100% {-o-transform: translateY(0);}
	40% {-o-transform: translateY(-30px);}
	60% {-o-transform: translateY(-15px);}
}
@keyframes bounce {
	0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
	40% {transform: translateY(-30px);}
	60% {transform: translateY(-15px);}
}

.bounce {
	-webkit-animation-name: bounce;
	-moz-animation-name: bounce;
	-o-animation-name: bounce;
	animation-name: bounce;
}