well, i read a lot from nuts on this board....
i am not ruling out that it is in all in my head. but, i did have a shock reaction to chocolate a few years ago, more than once. a couple of these included vomiting. then, similar stuff started happening with nuts. i only put it together the other night, talking with my wife, and realized i had thrown up on three kinds of nuts: almonds, peanuts, and pistachios.