well...my shutter speed was 1/30,000 of a second.... or there abouts....
basically what i did was in a rather dark room, (not totally dark..so i could see what i was doing) i set off a flash while my shutter was open. I took these at 1/60th f 7.1, but i have also done it at 4sec exposures. As long as your camera settings will make a picture black with out a flash, the burst of light from a flash will act as a shutter in essence. since a flash only lasts 1/10000-1/30000 of a second, you get shutter speeds equivalent to this. Some expensive comerical flashes last only 1/1000000000 of a second. Look Up Herold Edgerton. He did alot with strobe photography. (He is famous for the picture of the bullet piercing the apple)
and thanks for the comments