The actual gif is here: https://cdn.sstatic.net/Sites/gaming/img/header-foreground-image03.gif?v=330ce6fa0066.

Here it is uploaded to Imgur for your viewing pleasure:

[![ship][1]][1]

It only animates once.  After that, you need to refresh the page, or navigate to another page within Arqade.

  [1]: https://i.sstatic.net/Th92t.gif