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When I saw mention of being powered by compressed-air, my first and immediate thought was of those receipt/change capsules used in old department stores years ago (I remember the local Co-Op had them).
I assumed we'd all be sitting in these capsules and being propelled at Thrust SSC speeds to work. Every journey like a trip to Alton Towers.
(BTW how DO electric cars power their heaters? By electric elements? Or do you just freeze to death?)
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