There's a Mexican fast food chain in Australia called Mad Mex. And they just launched a burrito with PINEAPPLE as one of the ingredients. So you get your rice, your beans, your meat, your guac, your cheese . . . and pineapple.
A writer for Buzzfeed actually tried the thing, and she was surprised to find it tasted good. Quote, "It added a sweetness to the burrito I wasn't expecting."