Coffee roasting in a cast iron pan

I started buying green coffee beans and roasting them on the stove a couple of months ago and I'm totally hooked. This is a neat video from YouTube showing how it's done on the stovetop. (I use a cast iron frying pan to spread the beans out a bit more than this person does it.) Takes about 20 minutes all told once a week and we're good to go - and the taste is so wonderful.