I decided to practice using my speedlight in my garden gnome, Robert. He actually lives inside my house.
Here is a picture of Robert bouncing the flash off the ceiling at a 45 degree angle behind me. Since the flash was behind me, it did not create a shadow.
In this photo of Robert, I bounced the flash off of a window that is to the right of him so that he would be sidelit. I think that Robert looks more three dimensional in this photo, but the flash created a shadow behind him. Does anyone know how I could have prevented the shadow?