"Indian Devil Pepper", also known as "Broken Soul Pepper", is produced in eastern India and was recognized as the hottest pepper variety in the world by Guinness in February 2007.
It is the fourth hottest pepper in the world, and the hottest one is Dragon's Breath pepper. The Scoville index reaches an astonishing 2.48 million SHU.
When I tasted the "Indian Devil Pepper", I didn't feel much spiciness at first, but the spiciness became stronger and stronger after about 3 or 4 seconds.