Ah, much clearer. I think I've heard drops in a dubstep song I like before.
Anyway, I dunno what kind of advice I could give you. Sometimes I imagine dubstep in my head, but then when I try to turn it into something consistent in my mind, my brain just kinda goes "Nope." I think that means I can't structure it, so I can't even explain or advise on what sounds to do.