Oh, that's alright. [ It's not his fault, really. It would be more logical to suspect someone would know what a half-pipe is rather than not. Luna often finds herself the odd one out, not knowing about plenty of inventions of the Muggle variety. ]

The chimney was a good point to draw attention to. [ She points up towards it with a faint smile before falling into a hushed thoughtful silence. In truth, she doesn't know what skateboarding is — she's never even learned to ride a bicycle. But it's not to say that it doesn't exist in her world. There's plenty Luna's learnt about the Muggle world, but she's not really learned much about her Muggle world. ]

Possibly—? I suspect it would be a Muggle thing if it is. [ There's a beat before she helpfully adds: ] Muggle means 'non-magical'.