Using this gif:
Intentionally decide with other folks that you'll post it in a thread, and then you'll all react as if it's hilarious, despite the fact that no image will ever load. Watch as other people comment in frustration that they can't see the hilarious gif that doesn't exist.
Then feel bad because you're a bad person for doing that.
In all seriousness though, I think this is a good Kinja feature. It's nice to have a heads up that images take some time to process, rather than thinking my image didn't get through at all. Thanks Kinja team.