WHAT the HELL just happened!?

Hey!

So i started zapping with the copper pipes around my neck. No problem here. Moved up to left/right jawlines and...

30KHz felt massive vibration through my bottom lip.

Decided this was cool, see what 2.5KHz did - even more buzzing in my lips.

...Went to 15Hz and i started SEEING white pulses with each vibration of the zap!

What just happened?
Assuming this isn't good, is it okay to stay at 30KHz in that area?

Thanks! Tweet