I like the last one the best. Pretty coolThose are all pretty cool.
Very interesting images.
I was trying to do this also but was having a hard time when to snap the photo. I had the shooter counting down when he was going to shoot and timing the snap on that, but results were sporadic.Canon 350D
Shutter speed of 2 seconds.
Aperture was 22 (I'm not sure, but It was a hgh number)
And of course use a tripod, and I used a remote control to take the picture not to shake the camera.