If you're having a taco emergency, who are you going to call? Not this Taco-Mergency truck, which has been spotted around San Francisco recently, because it is sadly only a movie prop.
Don't worry, though, in the case of a real emergency, there are plenty of real food trucks that are fully prepared to help you out. For example, there's the Snowcat burrito truck (if you're on a mountain), the amphibious ice cream truck (if you're on the Thames), and the Grillenium Falcon (if you're in a galaxy far, far away). So rest easy.