I wonder just how practical, controllable, and safe, ballbusting is using a blood pressure measuring machine

I’ve found very little information, mainly this clip,

“Clothed rusian policewoman ballbusting squeeze with blod pressure meter” (sic)
https://www.pornhub.com/view_video.p...h5b80657b55fe9

I love to know if anybody here has tried this, especially with a battery operated machine.