Jo had gotten Sam's text about his general plans for wandering the streets looking for something to hunt and had decided to take him up on the offer to join. Arming herself a little bit better than her last walk through the city, this time planning on action rather than blindly stumbling into one of the many creatures LA had to offer, Jo took off in the direction Sam had said he was headed.
She rounded the corner of the alley that Sam and possessed Doctor were fighting in just as Sam seemed to burst away from the Doctor's grip with no physical means. She could only assume that meant he had gone through with working on his abilities. Jo quickly moved to Sam as he gasped for breath, reaching him as he scrambled to his feet and threw the water at the demon. She pulled a flask from her jacket pocket, eyes snapping to the demon.
"Neat trick," she mentioned to Sam in a rather quick greeting.