I have a popcorn popper it is an electric device that has a rotating arm to keep the corn moving and the big bowl lid as holes for steam to escape. You turn it on, drop some oil, pop the corn, put the cover on over the steam holes, turn it upside ddown and eat out of what is the lid. You can place butter on top and the heat melts it and it drips down but it isn't the same as melting in a pan and pouring on top.
Soon's I remember what my Dad used to call margarine I'll post up. It was always funny to see his face twist up & hear him let loose on Mr. Kraft.