For some strange reason, I think that the personal flying machine is the most improbable. I daresay that gliders with as little surface area as those would barely (if at all) get you to the ground from a cliff. Going up and down at would be impossible.
The personal waterwheel raft could possibly work if you added a float on each side to keep your balance.
The moving pavement is just plain loony. Possible, but there are multiple better and cheaper alternatives.
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mudshark: Nate's just being...Nate.
Zeke: It comes nateurally to him.
mudshark: I don't expect Nate to make sense, really -- it's just a bad idea.
Sa'ar Chasm on the 5M.net forum: Sit back, relax, and revel in the insanity.
Adam Savage: I reject your reality and substitute my own!
Hanlon's Razor: Never attribute to malice that which can be adequately explained by stupidity.
Crow T. Robot: Oh, stop pretending there's a plot. Don't cheapen yourself further.
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