Bhut jolokia - also known as "ghost chilli" is the world's hottest chilli.
(They are over 125,000-times spicier than a jalapeno. On the Scoville scale, the scientific measurement of a chilli's spiciness, it measured more than 1,000,000 Scoville units: Classic Tabasco sauce ranges from 2,500 to 5,000 Scoville units, while jalapeno peppers measure anywhere from 2,500 to 8,000.)