I recently came across a use case for event.originalTarget, and it would have been nice had documentation existed on the site detailing that it existed, and how to use it.

The use case was that I was binding a click event to an a tag, but I only wanted it to fire if what was clicked was the a element itself, and not any of its children. (It contained some form elements).

Example code:

$('a').click(function(event) {
    if(event.originalTarget == this) {
        //Whatever you actually want to do
    }
}