Man Overboard

I had lunch with this kiddo, and we read a story together. Right in the middle of the story, he turns to me:

Him: Do you think they'll ever invent an overboard chair?

Me: A what?

Him: An overboard chair.

Me: I'm not sure I know what that is.

Him: Yes you do! You know, an OVERboard chair. Like the skateboard things kids ride around on with all the lights on it and it's like they're "over" the sidewalk.

Me: OOoooOOOh! Got it. Yeh, I don't know if they'll invent one.