Q raises a sardonic, fatalistic eyebrow. "I hope that's true. For all concerned." He frowns. "I'd be glad to, but what? Actual documented cases of possession are extremely rare. Especially among wizards. I suppose I could read The Exorcist again, but it's hardly a scholarly treatise."
"Like I said, they're evil little buggers. And I suppose it's nearly impossible to get a sample to study."
Q, who perhaps has rather unrealistic expectations of how this will go, nods. "I hope so too." He'd really rather no one else was about whilst he experiments.