Looks like a multiple exposure. Can be accomplished a couple of ways. All require a motor winder/power advance (film cams), or multiple exposure mode & burst mode (digicams), or software.
1) hold down the film rewind button on the bottom of the cam and shoot multiple shots.
2) engage the double exposure mode and shoot multiple shots.
1) engage the multiple exposure mode and the burst mode and start shooting.
2) engage the multiple exposure mode and click the shutter as many times as you need (if you don't have a burst mode).
3) don't have mult ex mode? You're screwed!
create multiple layers and stack them while adjusting position and opacity to get the effect you want.
This might also work for a digital cam- make a long exposure and move a black card back and forth in front of the lens. Each time you uncover the lens you should get a new image. Have to play with this one to get the timing down, if it would work at all. [shrug]