2. Passing through the wall
There’s a wall on the stage that looks and feels very realistic. A magician approaches the wall from one side and the assistants hide him with special screens on wheels. The exact same construction is put on another side of the wall. A few seconds later the magician appears on the opposite side of the wall.
Although it may seem like Hogwarts magic, the performance is quite easy. There’s a special v-shaped tunnel going under the wall. That is why the spectators who study the wall and how solid it is, don’t find anything — the wall is ok, the floor is not. The magician needs just a fraction of a second to go through the small tunnel going under the wall and stand on the other side of it.