***Extreme eaters across the world are enjoying the world's hottest chilli sauce - made by a North-East stockbroker.Mark McMullan, from Darlington, first made the sauce in his kitchen "for a laugh". But when the Snake Bite Sauce was launched on the internet, it sold 400 bottles in eight hours. The remaining 100 bottles sold soon after.Orders came from Australia, the US and all over Europe. There has even been interest from Nepal, Iran, and Mongolia.The sauce is made from the rare naga morich chilli, which is 300 times hotter than a jalapeno.His website, a resource for other chilli growers, attracts 400,000 hits a month.