In the above video, photographer David Flores explains how to capture multiple exposure images using Fuji, Canon and Sony cameras. Note that while Flores explains that previewing your multiple exposure before capture is a benefit of mirrorless cameras, Canon DSLRs offer the same benefit through the use of Live View during multiple exposure capture.
If you own a camera with the ability to capture multiple exposures, you should definitely give the feature a try. You can create multiple exposures with the following Canon cameras:
Below is an image of my former neighbor I created using the Canon EOS 5D Mark III and EF 24-105mm f/4L IS USM. [Sean]