A trick on the SB-800

Recently a friend showed me a feature on the Nikon SB-800, it's called SU-4, It's slave mode built in to the flash so it can be fired by any other flash. To get it hold down the SEL button, Hit the
Icon with the 2 Swirvy Lines, and 2 Flashes and scroll down to SU-4 and hit the SEL Button. Now shoot off any other flash you have, it will work with point and shoot cameras, or anything else with a flash (a flashing light won't trigger it).