Edit in JSFiddle

<div class="box effect2">
	<h3>Effect 2</h3>
</div>

.box h3{
	text-align:center;
	position:relative;
	top:80px;
}
.box {
	width:70%;
	height:200px;
	background:#FFF;
	margin:40px auto;
}

/*==================================================
 * Effect 2
 * ===============================================*/
.effect2
{
  position: relative;
}
.effect2:before, .effect2:after
{
  z-index: -1;
  position: absolute;
  content: "";
  bottom: 15px;
  left: 10px;
  width: 50%;
  top: 80%;
  max-width:300px;
  background: red;
  -webkit-box-shadow: 0 15px 10px #777;
  -moz-box-shadow: 0 15px 10px #777;
  box-shadow: 0 15px 10px #777;
  -webkit-transform: rotate(-3deg);
  -moz-transform: rotate(-3deg);
  -o-transform: rotate(-3deg);
  -ms-transform: rotate(-3deg);
  transform: rotate(-3deg);
}
.effect2:after
{
  -webkit-transform: rotate(3deg);
  -moz-transform: rotate(3deg);
  -o-transform: rotate(3deg);
  -ms-transform: rotate(3deg);
  transform: rotate(3deg);
  right: 10px;
  left: auto;
}