what is this type of photography called?

[SlimPaul]

Problem with a mac is you would't even get that page, but a blank screen. All my macs keep crashing more than my pc's.

What macs do you use? My MacBook, nor my MacBook Pro almost never crashed.
Back to the topic. I looked it up in google, and it seems to be multiple exposure. It's really cool and I'd like to try it out for myself. Do you know if I can create it in Aperture?