© Natsumi/Yowayowa Camera Woman

Natsumi describes it nicely:

When I take my levitation farther away from the camera than 10 second distance, I ask someone (mostly my friend) to press the shutter release button. First, I ask my friend to be a stand-in in a proper position to get a composition and a focus.

I like the human way, but jump to her page to see the non-human options. (via kottke)