Testing SB-900

At last weekend, I bought Nikon Autofocus Speedlight SB900 flash gun. But I was busy and I havn't tested it yet. In fact, I haven't finished the manual and I don't even know how to use it. Anyway, I have just made some trial shots. Have a look! The first one was taken using no flash light. She was using computer and having an apple under fluorescent lighting and some light from computer monitor. Even with ISO400, it took fairly slow shutter speed (with my kit) and the photo is blur.

The second one was using built in flash light.

The third photo was taken using reflected light of SB-900 from ceiling.