Try to click the top of the "button" to reproduce it.
a.callToAction:active
{
box-shadow: 0 1px 1px rgba(0,0,0, 0.1); -webkit-box-shadow:0 1px 1px rgba(0,0,0, 0.1); -moz-box-shadow:0 1px 1px rgba(0,0,0, 0.1); -khtml-box-shadow:0 1px 1px rgba(0,0,0, 0.1);
position: relative;
top: 2px;
}
Cursor...