He shrugs. "It's impossible to be both human and ghost after all. Even if anyone noticed anything they talked themselves out of it."

Danny floats up again, just enough to leave some space between his toes and the floor. "You didn't notice? My voice echoes. But do me a favor and don't mention this to anyone." He flinches. "Please? I already met one guy here who was talking about dissection. And that was when he thought I was a hallucination."