2. A Message From Your Future Self.
One of the first thing Stuart did, was run down strangers and tell them that he had a message for them from their future selves. He would explain to them that their future selves told him what card they would be thinking of, and that that card was flipped upside down in the deck. It worked everytime! Magic? Or Time Travel?
4. Charging A Phone With A Banana
In Back To The Future 2, Doc Brown fuels the Delorean by throwing an old banana into the Mr. Fusion Home Energy Reactor. According to Stuart, there is a Mr Fusion iPhone charger in the future that can charge a phone by plugging it into a banana.