Hiding zips in jpgs

To prove that the strategy described in http://imgur.com/gallery/dJx29 was viable, I hid four imgur posts inside a single imgur post with the following commands:

zip zip.zip * To zip up all contents of my current directory. cat hU5cClq.jpg zip.zip > proof.jpg To concatenate both files into a new one.

Here it is:

You can go ahead and right click>save as and save the file as proof.zip. When you double click on proof.zip, you'll open an archive with four files. If it's named proof.jpg, however, double clicking will only show one image (no archive).