When Stacy confronts Barb on camera backstage, the monitor above their heads appears to flip the image, but it's not a monitor, it's the back of the projection screen from the main televised image that is the centrepiece of the Kippie Kann Show stage's back wall.
At the end of the movie when Stacy meets Carly Simon, you can see Stacy drop her cell phone and it clearly lands near the side of her head. When Carly helps her up, you can see that the phone is near her waist at that point.
Stacy: Perhaps luck exsists somewhere between the world of planning, the world of chance, and the peace that comes from knowing that you just can't know it all