Donna gets Jackie out of her room by spraying her with water. She puts the spray bottle on one end of the table. The next time the table is in view, the bottle is on the other end of the table. The next time, it disappears.
When Kitty reveals she is going to have intercourse, Hyde and Jackie put their arms around each other in disgust. In the next shot, their arms are in completely different positions, with no time for them to have moved them.