After Raven foresees the lamp falling from the ceiling, it just misses Dr. Sleevemore. As it sits on the floor, between shots the black wire attached to the top of it changes position.
When Raven is sitting with Chelsi and Eddie in the diner, talking about ditching them, there is a plate in front of Eddie with bacon on it. Then in one shot, it isn't there. Then in the next shot it's reappeared.
When Raven flies in the air at the end, you can see a certain part of her jacket lifted upwards in the air also, from where the string is attached to her to make her "fly."