Willie smiled. "I am a ghost, so it'd be super weird if I was just solid all the time or seen all the time. I can't hide from the other ghosts though- a friend of mine asked that and it was kind of weird to think about. As if it was some kind of superpower to be invisible rather than a natural state of being for ghosts."
Pulling his hair back and twisting it, Willie nodded. His skateboard appeared under his foot as his helmet popped into existence in his hands- the crack still splitting the side of it from when he died- and his jeans suddenly covered with kneepads. It was not about safety but about the memory of skateboarding with them; as if that was what controlled the very existence of the items to be readily available to him.
Rolling forward into the lobby, he spun the skateboard 180 in different directions using footwork and the memory of gravity. While none of it really affected him any longer, he found ghosts naturally accepted it and continued to live on as if they were beholden to the laws of physics. Actual items that they interacted with were, but nothing about his skateboard or gear had any physicality to it. Every trick he did was inacted as if he were still alive.