Are these stun gun modules? And do they hurt? (yes)

These modules are widely sold on eBay as high voltage pulse generators with grossly inflated output voltage figures like 400kV. They put out closer to 20-40kV as 400kV would probably jump about 150mm/6" in dry air.
They are so cheap and mass produced that they must be from a common product, so I decided to test if they were for stun guns by touching the output....

Note that the circuitry in these modules appears to be based on a high frequency inverter with a multiple stage multiplier as opposed to the traditional circuitry I described.

Here's an eBay search link for these interesting modules.
https://www.ebay.com/sch/i.html?_from=R40&_sacat=0&LH_BIN=1&_nkw=400kv&_sop=15

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