You all have my interest peaked now. As soon as the weather warms a little here I'll heading out to try some of these "poppers." I do have one question though. Is it possible or effective to fish with two poppers at once with a tippet-fly-tippet-fly (---------*----------*) set up? I have frequently fished for trout using two dries at once to help narrow down what is working quicker. Is it possible to do this with poppers or would it look unnatural to the fishies to have two bugs (?) doing the exact same thing in close proximity? I'm talking having like 24-36 inches in between flies.
One more question that just occured to me: What do most poppers imitate (excluding frogs cause that is obvious)?

Thanks in advance for the replies!