I have a bottle of Dave's Insanity Sauce in my refrigerator. A single drop the size of a pencil point will put me through the roof. Bought it on a whim and now keep it for grins. Literally a pencil eraser will make a HUGE pot of chili almost unbearable to eat.
Should have known better and read the back label. It says it can also be used as a floor stripper. Here's part of the Wiki entry
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It has been rated at 180,000 Scoville units[1], compared with 2,500-5,000 for Tabasco sauce, which, before the 1990s, was the hottest sauce known to the average consumer. Part of the intrigue behind the sauce name (Insanity) was founder Dave Hirschkop's wearing of a straitjacket at events promoting his products.
The introduction of sauces made from capsaicin extract started an arms race. Dave's Gourmet has since introduced sauces with increasingly greater concentrations of capsaicin under names such as Dave's Commemorative Insanity, Dave's Total Insanity, and Dave's Ultimate Insanity, which has been reported variously as from 90,000 to 250,000 on the Scoville scale and comes with a caveat Use this product one drop at a time." Keep away from eyes, children and pets. Not for people with heart or respiratory problems. Also offered is Dave's Private Reserve which comes in a coffin-shaped package and has been reported variously as from 500,000 to 750,000 Scoville units. His most recent release is a super-limited holiday edition, which is two to three times as hot as his private reserve, and was limited to 200 bottles total, selling for $199 per bottle.