Danny's ghost sense didn't quite go off in time to warn anyone of the other ghost in their midst. And things had moved quickly enough that he hadn't gotten a chance until just now.

"Hold that thought." He snapped, going intangible, and charging at Kon, bodily shoving the possessing spirit out of him.

"Protip. You wanna talk? You do not start by getting someone possessed." Danny growled. "What the hell is wrong with you?"