@-webkit-keyframes jiggle {
       0% {
         opacity: 1.0;
         -webkit-transform: scale(1.0) rotate(0deg);
       }
       33% {
         opacity: 1.0;
         -webkit-transform: scale(1.0) rotate(6deg);
       }
       67% {
         opacity: 1.0;
         -webkit-transform: scale(1.0) rotate(0deg);
       }
       100% {
         opacity: 1.0;
         -webkit-transform: scale(1.0) rotate(-6deg);
       }
      }

div { width: 70px }

 .r-box {background: -webkit-gradient(linear, left top, left bottom, from(#999), to(#555)); color: #fff; line-heigt 20px; width: 70px; padding: 10px; -webkit-border-radius: 6px; -moz-border-radius: 6px;}

 .r-boxjiggle {background: -webkit-gradient(linear, left top, left bottom, from(#999), to(#555)); color: #fff; line-heigt 20px; width: 70px; padding: 10px; -webkit-border-radius: 6px; -moz-border-radius: 6px; -webkit-animation-name: jiggle; -webkit-animation-delay: 3s; -webkit-animation-duration: .1s; -webkit-animation-iteration-count: 5;  -webkit-animation-timing-function: ease-in-out;}