Was at my sisters house on Sunday and took my camera gear with me... what you don't? Decided it was time to play with bounce flash and my two flashes. I set one up on optical slave15 ft away on top of the fish tank 1 ft from a wall pointing straight up. The other was on top of my camera pointing straight up. Used manual mode with a K-50mm f1.4 at f2.0 or 2.8, can't remember, for the first one.
This was taken with the same flash set-up, but with my Sigma 17-70 at 28mm and f5.6. This was terribly underexposed but was rescued.