Related: the "nuclear manhole cover" [1] (actually a 900 kg piece of armor plate) which may have accelerated to several times Earth's escape velocity over the course of a few meters (tens of millions of g's which is definitely impressive for such a heavy object). It was likely vaporized due to compressive heating before escaping Earth's atmosphere, however.

(I'm rather amused by the idea that some manager type evidently thought that a hunk of steel might contain a nuclear explosion in what was in essence a very large cannon!)

[1] https://en.wikipedia.org/wiki/Operation_Plumbbob#Missing_ste...

Like the borehole cap on https://en.wikipedia.org/wiki/Operation_Plumbbob Pascal-B

Well, that doesn’t quite work either. Energy and time are also conjugate variables, so there exists an uncertainty relationship between them.

And since you can relate energy to momentum in a well defined way…