After all this time, I finally figured out how they mean for you to do this.

I had not noticed the "BB code" button option and posting the default HTML didn't work here and I was having to just copy the img code part of the code, a PITA. It is actually pretty convenient now that I know how it works. Just click "Share this" then "Grab the HTML/BB Code" then select "BB Code" and choose a size. Copy the code and post it.
Even an old Dawg can learn new tricks.
wheel by
BluesDawg, on Flickr