Man, @charlied34's mango story is all too familiar. I had a close call with a coconut drink from a street vendor in Vietnam last year. The thing was sitting in the sun all day, and I could tell it had gone bad just by the smell. But I was so dehydrated I drank it anyway, big mistake. My gut was in knots for a full 24 hours, and I missed out on a whole day of exploring. It really shows how tricky it can be to judge what's safe in that heat. What's the worst street food or drink you've risked and regretted?