Animated 3D Bouncing Ball with CSS3, Html5

HTML

<div id="ballWrapper">

     <div id="ball"></div>
     <div id="ballShadow"></div>
</div>

CSS

#ballWrapper {
    width: 140px;
    height: 300px;
    position: fixed;
    left: 50%;
    top: 50%;
    margin: -150px 0 0 -70px;
}

#ball {
    width: 140px;
    height: 140px;
    border-radius: 70px;
    background: linear-gradient(top,  rgba(187,187,187,1) 0%,rgba(119,119,119,1) 99%);
    box-shadow: inset 0 -5px 15px rgba(255,255,255,0.4), 
                inset -2px -1px 40px rgba(0,0,0,0.4), 
                0 0 1px #000;   
}

#ball::after {
    content: "";
    width: 80px; 
    height: 40px; 
    position: absolute;
    left: 30px;
    top: 10px;  
    background: linear-gradient(top,  rgba(232,232,232,1) 0%,rgba(232,232,232,1) 1%,rgba(255,255,255,0) 100%);
    border-radius: 40px / 20px; 
}

#ballShadow {
    width: 60px;
    height: 75px;
    position: absolute;
    z-index: 0;
    bottom: 0;
    left: 50%;
    margin-left: -30px;
    background: rgba(20, 20, 20, .1);
    box-shadow: 0px 0 20px 35px rgba(20,20,20,.1);
    border-radius: 30px / 40px; 
}