I placed a Rosco Vivid Blue gel over the Canon 188A Speedlite and positioned it on a chair against the wall.
Then setup the light stand with the Vivitar 285HV on 1/16th power to camera right, behind me and forming about a 60 degree camera-subject angle.
I then grabbed the nearest child not doing anything and held a large white polystyrene reflector close to his head and shot away.
The only downside is the 188A seems to need to be turned off and on between shots (the optical trigger obviously doesn't quite agree with it).
I really should have setup the umbrella to soften the shadows a bit, but got lazy as I was really only testing the optical slave.
View all photos taken: Tuesday, 29th January 2008, This photo: 8:01pm