Couple of years ago there was a guy from Long Island selling hot sauces at RISAA.
I tried his habanero sauce--it had some bite, which I expected. I can take hot and spicy.
Then, I sampled something he called his "Formula 666 horseradish". Dipped a cracker into it, popped it into my mouth, and my eyes immediately started leaking tears by the quart, along with what came running out of my nose.
Luckily, the Gansett samples were right around the corner.
Habaneros are around 100,000 on the Scoville scale, as I recall. This hot sauce dude had some sauce called "Satan's Blood" that was something like 800,000 Scovilles. I didn't have the balls for that--the horseradish was all I could handle.