So you love the Avengers movies? If you love playing around with Spark products, you could always build your own Iron Man Repulsor and Arc Reactor. The below video shows how you can use a Core and Internet Button to build your Repulsor.
The Repulsor uses the Button’s built-in accelerometer to determine what position your hand is in. When you hold your hand at a 90 degree angle, an event is published to the cloud. The servo and the Reactor are subscribed to the cloud for that event. Intrigued? You can find out more about the project here.