DCE messed his first opportunity up. In the end, the second was special but just one of those scenarios where he had no other option and it paid off.
Still, have no idea what was going through the Knights mind. Apparently, that's the trick play, but why give it to Boyd and not say Roberts or somebody with a long kicking game? Really, Mullen should have put himself into better position and taken the shot himself, that was the play and he butchered it.