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Cnidocytes accelerate a microscopic needle at anywhere between 40,000 and 5,410,000 g.

https://en.wikipedia.org/wiki/Cnidocyte

How often do you just turn it on just to give it a spin? I'm not sure if be as productive in a lab with so much nice equipment, but I'm sure people get used to it.

What is it used for?

Centrifuges are used for separation. An ultra is usually used for separating nominally-stable colloids (such as fine nanoparticle colloids), and miscible liquids where such high centrifugal force causes them to density separate.

I was also curious and found this youtube [1]:

Summary (found in video at 10:48)

1) separation of subcellular organelle (DNA/RNA) 2) extract solutions in biological fluids from aqueous to organic solvents 3) seperate lipid components 4) pelleting of ribosomes 5) pelleting of macromolecules

[1] https://www.youtube.com/watch?v=lRT_8nFc2Tk

Ha. On a hunch I watched that video and hunch confirmed in the first second: I used to work for those guys, but not in the Centrifugation division :-)