Tyson has somehow convinced the team that we still need SketchUp training, despite how easy it is to learn SketchUp. He also spends time as a hobbyist woodworker, so if there are a lot of furniture training examples... apologies for the obvious bias.
No, not the "deep meaning of life" kind of reflections -- I'm talking about the kind of reflection you'd see in a mirror. More specifically, the kind you might see when looking across a pool or lake. Here's a quick and easy way to simulate reflections in SketchUp: