He was fighting you for a while. You were a member of the Akatsuki, probably the strongest aside from Itachi because you could transfer your mind into others and take full control over them by the fault of going unconscious. That's how he got ahold of you. You were with Deidara and Sasori when he attacked and when you tried to fight him you landed a hit, but he blocked it to the point you couldn't move. Deidara and Sasori were actually going back to the base to get back up, you main job was to stay alive for now. Now that your were in his grasp, He examined you, all the way to the top and bottom "Your body is...heh heh! You'll make a marvelous test subject." He held you with his snake bind aiming the snake to bite your neck