Cats -- so awesome that...

[JasonPratt]

As an example:



This is a case where Grogheads itself is the source of the image.

If you just have the image on your computer, however, you'll either have to upload it to an image hosting site, or try to find where you got it from (unless you made it yourself, which would admittedly be more awesome.) Otherwise, you're doing the best you can, simply providing it as an attachment.