Pictures below were all taken on my 35mm camera with color slide film. The fun part, for me, is the mystery. Especially with an analog camera, you have no idea what you're going to get with a multiple exposure, and it takes a while too find out.
These pictures were taken with my partner on a roadtrip in Oregon last year. To be honest, I can't remember who took which shots, though some look more like her work and some look more like mine. I love how unified the colors turned out to be... ahh, the Pacific Northwest!
And here's one that was a magical mistake I made:
Here are some more multiple exposures on color slide film from this same trip.
If you'd like to see more, Brooke and I put together a photography exhibit of all multiple exposures, combinations of portraits we've taken of each other as a way of showing multiple perspectives within a relationship.