The ability to lift the hands up against gravity is quite an achievement and is enjoyed by the person.
Roll over and hold still is connected to ACL 1.6; lift and hold still is connected to ACL 1.8.
While in bed, they can lift their buttocks for bridging. During a transfer, they can supply about 50% of the effort to sit up or lie down. While sitting, they can imitate range of motion exercises for their upper extremities.