@neonthewrite– Those sorts of things would be very neat, and if the sprites ever had something like that around, the idea would have come from Sam. The only tricky part is having the parts in the right shape for something like that to work.

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@nightmares06– Sam was a little young for this at the time. Dean was the more hands-on kid, and more likely to know the mechanics of something like that while Sam would rather look up the information in a book before attempting. He might have devised something as he aged, but unlike the hang glider where he had Bowman’s wings to poke at to help his design, he has nothing to reference.