Have to agree about leaving this one as it is.
I've played with a few acrylic balls. The first ones I got where only 1" and so really needed a macro lens to shoot them. I since got a 4" version which is much better, but too heavy to carry around on the off chance of a good setting.
With the mini version I've taken a few with the ball in my hand that worked OK inverted, but where the foreground is part of the scene I don't see inversion looking right.
Sometime I'll have to try making a chain with them & shooting one ball through another. There's no denying they give a bit of fun to photography!