I remember the hair standing up on my arms and head with a tickle when I powered a 50MVA transformer with 100kVdc on top to test the insulation and walking outside the safety fence created this whereas 100kV ac does not as the DC charge leakage currents are higher with DC modulated by 120Hz rectifier. which created the tingle sensation on my scalp..
Even more interesting was the bugzap sound on the wall every second 100 ft away due the same E field. tick tick.... until I ground some floating rails mounted on the wall with a tiny wire to earth ground. It was annoying sound for some. Meanwhile we were 10 ft away outside the fence.
At no time was I nor anyone else helping me with my experiment at risk.
For a while I felt what Benjamin Franklin must have felt.
lucky.
even tho the fence was grounded , you could still get a zap from touching the epoxy paint.
Similiar to touching an old TV tube made from leaded glass for both Xray and ESD reasons.