That is the exact same setup I used. The hall way is much preferred to the door frame because you have a large area you can lean on, and if you do in fact fall you may not be able to hit that frame exactly how you need to in order to avoid injury. I actually have had more time on the rollers since I bought my road bike than I have had on the road. It's obviously not something that is impossible to do because so many people use them. Once you realize this you know it's only a matter of time and practice before you'll get the hang of it.