I used to grow Habaneros in my garden.
Towards the end of the growing season, I found that I had too many, and not enough ambition to dry/can any more so I brought a load into work.
Most of the guys were knowledgeable enough to show the peppers due respect, but of course you always have the fool.
In this case, the fool's name was Bill. He was the janitor. Bill insisted that he would eat one raw straight away since he had an "iron stomach". I pleaded with Bill....."Don't be stupid, Bill.....save it for later; cut it up on some food......."
Bill didn't listen to reason.
Bill went to the hospital that afternoon.......apparently the pepper irritated his stomach sufficiently to cause some presumably pre-existing ulcers to start bleeding badly.
Great stuff.