LOL - I'll own up to being a first-class idiot just a month ago.
I was having some acid reflux, pretty unusual for me, but then my diabetic event was filled with peculiarities. Anyway, a roll of Tums ran out, so I looked online - apple cider vinegar, a couple of Tbs, cool!
So - I get the ACV and - oh yes I did - turned it up and took a swig right from the bottle. It burned like a son of a ... @@#$U#Yy!!!! I was sure my esophagus had sprung several resulting leaks.
I then learned the fine art of dilution.