Meh - just shoot manhole covers at them:
https://www.quora.com/What-is-the-fastest-speed-of-any-object-on-the-earth/answer/Talon-Torres
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The shaft had, in effect, become a enormous 500-foot long, four-foot wide gun barrel with the energy of billions of pounds of TNT released at one end and, at the other end, the now insignificantly small metal cap, about the equivalent of a bottle cap on the end of a naval gun.
...
Later calculations showed that the heretofore mundane four-foot metal disk had been launched at
six times Earth’s escape velocity. That’s
one hundred fifty thousand miles per hour. Forty-five miles
per second.
...
So somewhere in the New Mexico desert, unknown and unmourned, lies an American relic, a piece of history like no other: the fastest man-made object ever.
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