Amusing footage of the designers of a new, super strong iPhone case testing the durability of their product by throwing an iPhone around an Apple store.

The video, filmed in Apple's flag ship store in Regent Street, London, shows the men dropping a phone they've just bought off a balcony in the store, and it turns out the case is pretty strong.

One of the men later wrote online: "As soon as we got the iPhone 7 out, we put our real black marble case on and started throwing it around in store.

"People were extremely shocked and we eventually got asked to leave by security."