"I was possessed once." Owen admits, pulling out an IV bag, and an extendable IV rack. "Really wears you out. Arm please." Owen says, holding his hand out to take Sherlock's arm.
John is interested in hearing this, and speaks up. "You were possessed?" He asks, looking between Sherlock and Owen a few times.
"Yep. Back awhile ago. When I died. Duroc. Nasty thing." Owen speaks as he pulls out an alcohol pad to clean a spot on Sherlock's arm.