Jon left his room and walked downstairs. It was a bit weird, walking through his house and knowing that no one could see him. He observed his little brother Mikey watching TV and his mom moving about in the kitchen.
It was at this time, however, that his Goth sister Zoe was walking by. Jon didn't notice her and she didn't see Jon, because of the Cloak of Invisibility. So, they both collided into each other.
"What the fuck?" Zoe uttered, wondering what just happened. She was just walking along, maybe a little bit in a hurry, when it suddenly felt like she collided into something. But there was nothing there.
The collision had been severe enough to knock Jon out. And there he was, out cold on the floor of the living room. And still completely invisible.