Chance Encounter

You ask him if he needs help but he does not speak English. He hands you a key and gestures to the air beside him. You turn the key in the space he pointed at and it opens an invisible door. You walk through and end up on Mars. There you see a statue of your future self. You ask the Martians what happened and they explain you died in a war. Traumatized, you head back through the door and go home. There you never leave your bedroom again.