What caused the shadow?

[Grandpaw]

Going by the picture taken you can see the side of the speaker stand near the stool. This tells me that Gotrocks was at least slightly to the stool side of the speakers stand when the picture was taken. The shadow from the mic stand had to be made from light coming from the right to throw the shadow to the left side of the mic stand on the wall. The shadow of the mic cord on his jacket is to the left also. With these two facts, to me, it is physically impossible in my opinion for the on camera flash to have made these shadows by itself. There is a second light source coming from somewhere. Adding back into the equation that it only happened on this one picture this would indicate another flash went off almost at the same time from a different angle and you didn't realize it, Jeff