1. One thing special about Thor's hammer is that it helps generate a magnetic field so strong that the hammer is impossible to lift when placed over a metallic surface.
2. Alan Pan built a real-life Thor hammer by, when a stranger tries to move the hammer, the first sensor relays the message to an Arduino Pro Mini computer, which in turn activates the electromagnet, making it impossible to lift.
3.He is the only one that's able to lift it because he began by placing an electromagnetic magnet obtained from a microwave inside a hammer shell.