Learning something new can be shocking...
I was testing breakdown strength of a lamination-type plastic foil.
Two sharp electrodes on either side of an A4 sized piece, 60KV on them.
No breakdown.
Nice.
Turn off the power, discharge everything, remove the foil.
The foil had a strong static cling on it, and i found it fun.
A few seconds of playing with it, i ended up with one back-of-the-palm on one side of the foil, the other one on the other side...
And got one heck of a ZAP!
Not too bad, kind of like touching a larger Van-de-graaf generator, but the surprise factor definitely helped the freak out process.
This is how i learned what "dielectric absorption" is.