Mach 10, ten times the speed of sound, would be about 7,600 mph. It hasn't been reached yet, but could a pilot even survive such intense speeds?

So that’s how fast a human has thrown the ball. ... you get a max fastball velocity of about 125 mph,” said Jimmy Buffi, who has a PhD in biomedical engineering.

Because it is categorically unfeasible for a human to run 100 meters in less than one second, the limit exists somewhere between there and Bolt’s current 9.58-second record.