Grew them for the first time this year. They are a thin walled Japanese pepper that is typically prepared by blistering them in a hot pan and then served with or on meat. Fun part is most are mild but some are HOT. They refer to it as russian roulette with peppers. Internet says 1 in 10 but 1 in 4 seems more accurate.
Several years ago Doritos had a bag of chips that had a few very HOT chips in them. A few guys from work brought them to the break room and we'd take turns eating them until someone was in tears from the random flaming hot one. Good times.