I used to kind of know when to look out for it. Mexican and Thai are major offenders. But one day I was eating mashed potatoes and I saw some green. I thought it was impossible and decided it was probably parsley. I soon found myself eating mashed potatoes flavored with cheap pink hand soap from the bathroom. I think I'm going to start telling the people at restaurants that I am allergic to it, so that they don't look at me like I'm a weirdo if I ask if there's cilantro in their pancakes.