No photoshop other than brightening up my hand a bit.
Done with my camera on a 10 second exposure. After hitting the shutter, I:
1. fired the light stencil floating in the air
2. set the stencil down and picked up a small slave flash
3. floated my hand where I thought the tree was
4. aimed the flash at my ceiling and shot it, lighting up my hand in the shot
I don't really like how there isn't a background full of stuff, like my other light stencils were. I'll probably end up using this one again in a different situation.
Test shots: [link][link]