The hottest thing I have ever tasted was a mouse shit chilli (named that because of what it looks like)in Thailand. The lady used half... and I was scared to lick my lips for about an hour. How hot is hot? The Scoville test has become the industry standard for determining just how hot, hot really is when talkin? chilli. The index goes like this: 0-5,000 Mild 5,000-20,000 Medium 20,000-70,000 Hot 70,000-300,000 Extreme A Mexican jalapeno comes in at 3,500-4,500 units. Thailand?s long, slim phrik chii faa (sky pointing chilli) scores 35,000-45 000 units, rising to 60,000-80,000 for its scorching phrik khii nuu (mouse shit chilli). India?s bird?s eye chilli blasts further up the scale to 100,000-125,000, but is no match for Mexico?s Yucatan Peninsula, or scotch bonnet at a blistering 300,000 units. The heavyweight title for the hottest chilli on earth however, goes to the Red Savina Habanero with a volcanic 570,000 Scoville Heat Units.