For extra fun ...
... put your favorite secretary in the chair while you've got it hooked up to the 'scope.
Once when testing for this kind of thing, I discovered that the average female office worker can generate upwards of 85KV walking down the hall to get a cuppa, but myself walking along the same path came up static free. Seems my unmentionables were made of cotton, hers were made of silk and petrochemicals. Her heels were leather, my soles were high-carbon rubber.
It might not be very politically correct to discuss such things these days, but then I don't get paid to be PC, I get paid to fix problems.