Apparently, UPSIDE-DOWN CHRISTMAS TREES are trendy this year.
You can either mount your tree to the ceiling so it hangs, or buy an artificial tree that's designed to stand upside-down. Pretty much every store sells them now, from Home Depot to Target.
So what's the point? Well, if you're into serious religious symbolism, the upside-down tree is big in central and Eastern Europe because people think it resembles the shape of Jesus on the cross.
Or if you're more into aesthetics, the upside-down tree shows off your ornaments better, because they're dangling into the air, not being covered up by thicker branches underneath.