Sproingy Wheels!

I ran across the following on AliExpress, selling for $109.73 a pair.

At first glance, it looks like inline skates where the wheels are at the bottom of a sprinted platform. However fatal such an arrangement must be, I was temped.

The reality is somewhat less bad. The wheels and springs are options; you get the boots and both kinds of bases and attach whichever you prefer.

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