The Little Engine That Could

In August of 2006, MTH delivered their Premier line model of a PRR A5.  This is a very small four-coupled (0-4-0) steam locomotive that was used as a yard switcher to move around cars and make up trains.  As a scale model, it's tiny compared to most other O-Gauge steam locomotives but it's very detailed and quite powerful for its size.  In this True HD 1080p video, you can see how exquisitely detailed it is.  I've also run it in several of the ways that you might have seen it running in real life