[lowestprimate]

The acceleration record is probably the manhole cover launched via nuclear explosion. Accelerated to 125,000 mph in a millisecond. https://www.businessinsider.com/fastest-object-robert-brownl...

[dwaltrip]

Crazy. At what speed / acceleration would a manhole cover burn up from friction with the atmosphere?

[zaptrem]

"StackExchange: Could the end cap of the Pascal B (1) survive its trip through the atmosphere?"

https://physics.stackexchange.com/questions/488151/could-the...

[93po]

To clarify for anyone unfamiliar - this isn't a manhole cover in the traditional sense. It was a 2000 pound hunk of solid steel. It makes this story much more plausible because a regular manhole cover would blow into a million pieces