Once when I was in middle school, this kid in my class named Ricky Morse built a hovercraft for the science fair. it was like a wooden table top with some mechanical doo-hickies on it. Ricky worked on it with his dad, who was the school's physics teacher, and it was totally awesome. Anyway, having a real hovercraft would kick a lot of ass, though not as much ass as having an individual rocket-fueled jet-pack.