Dave's Insanity Sauce...it'll leave a mark.
That's the stuff! One drop renders the entire meal unpalatable and the next day I found myself on the crapper with tears streaming down my face.
I don't know about Dave's Insanity Sauce...but I usually snort pepper spray...one shot each nostril. I'm out for a day, then blind for a week.
"Dave's Insanity Sauce..."
Someone brought a bottle of this to a chili feed we had at work a few years back. One smartass, not realizing what he was doing, just drenched a burrito with it. First time I saw him speechless. He made some pathetic wheezing sounds and began to cry. Oh, it was wonderful.